Boyfriend (of 2yrs) cheated on my, we wanted to get married and I still want him, but idk if I could/should forgive it. I need advice

I'm 19 (fem) and he's 25 (we started dating when I was 17), my parents know him and approve him, we've been together for 1 year and 8 months. I'm a med student and he just graduated as a dentist. We are so compatible (career, goals, dreams) and we had a great relationship.
He had to do an internship/social service year to get his credentials (that's how it works in my country) and he had to move to another city, 3 hours from me to live alone, we would only see each other during the weekend. We had problems before bc he still had commitments/emotions issues from his previous relationship (4 toxic yrs), he was afraid of me leaving/stop loving him, I always gave him all, I felt like I was paying for someone else's mistakes and putting up with double the effort, but I did it anyways bc I love him and wanted him to get better. We did overcome that, got over it and everything was better, he did went to therapy and improve a lot. But then he confessed me that he stared seeing another girl from the same clinic where he worked (Around Dec 2019), he said they were just friends and just had a "couple" "hang outs" as "friends", that nothing really happened, that he realized he was kinda catching feeling but it wasn't worth it so he ended it and confessed it to me. I forgave him, I didn't thought it was a big deal and kind of understood it bc he was alone and we couldn't see each other as often and we also promised each other to talk if one catched feelings for someone else while we were apart.

We were good for months, I felt happy and always pampered him and tried to be the best girlfriend. I made him a Harry Potter cake for his birthday (Feb 14th of this year) and posted the picture and tagged him (Neither one of us really post that much on fb or ig, also we kept our relationship private outside family and friends for a long time bc of his commitment issues) and the other girl saw the picture and realized he had a gf (me), she confronted him and he said he was sorry for his shitty behavior. I came to know her side of the story bc she wrote me a dm on ig, she said he never told her about me, not even mentioned me, that he introduced himself as "single" at work (he later told me that he meant it as single vs married) and they stared hanging out and going to the movies, went out to eat, etc. Turns out he just kind of distanced himself from her after he confessed me (he didn't told her about me even then) but they kept seeing each other at work and being kind of friendly. After I got her dm I confronted him, and asked him to tell me all the truth: turns out they actually hooked up (didn't ask for details, still don't know if it was just kisses or 3rd base, etc) before telling me and after confessing me he still went out twice with her before she found out about me. I love him so much, we talked about our plans, about marrying after I graduate and how we wanted to be together for the rest of our lives, he made me happy and I never loves someone like I love him, but I'm hurt, I feel so betrayed, I feel so naive and stupid, I can't even understand why it happened. I asked him for a break, time to think. And I don't know if I could/should forgive him. But I just can't help but miss him (bc of quarantine, I had covid recently and we haven't seen each other for almost 1 and a half months). I need some advice.

Submitted May 06, 2020 at 11:40PM

I'm 19 (fem) and he's 25 (we started dating when I was 17), my parents know him and approve him, we've been together for 1 year and 8 months. I'm a med student and he just graduated as a dentist. We are so compatible (career, goals, dreams) and we had a great relationship.He had to do an internship/social service year to get his credentials (that's how it works in my country) and he had to move to another city, 3 hours from me to live alone, we would only see each other during the weekend. We had problems before bc he still had commitments/emotions issues from his previous relationship (4 toxic yrs), he was afraid of me leaving/stop loving him, I always gave him all, I felt like I was paying for someone else's mistakes and putting up with double the effort, but I did it anyways bc I love him and wanted him to get better. We did overcome that, got over it and everything was better, he did went to therapy and improve a lot. But then he confessed me that he stared seeing another girl from the same clinic where he worked (Around Dec 2019), he said they were just friends and just had a "couple" "hang outs" as "friends", that nothing really happened, that he realized he was kinda catching feeling but it wasn't worth it so he ended it and confessed it to me. I forgave him, I didn't thought it was a big deal and kind of understood it bc he was alone and we couldn't see each other as often and we also promised each other to talk if one catched feelings for someone else while we were apart.We were good for months, I felt happy and always pampered him and tried to be the best girlfriend. I made him a Harry Potter cake for his birthday (Feb 14th of this year) and posted the picture and tagged him (Neither one of us really post that much on fb or ig, also we kept our relationship private outside family and friends for a long time bc of his commitment issues) and the other girl saw the picture and realized he had a gf (me), she confronted him and he said he was sorry for his shitty behavior. I came to know her side of the story bc she wrote me a dm on ig, she said he never told her about me, not even mentioned me, that he introduced himself as "single" at work (he later told me that he meant it as single vs married) and they stared hanging out and going to the movies, went out to eat, etc. Turns out he just kind of distanced himself from her after he confessed me (he didn't told her about me even then) but they kept seeing each other at work and being kind of friendly. After I got her dm I confronted him, and asked him to tell me all the truth: turns out they actually hooked up (didn't ask for details, still don't know if it was just kisses or 3rd base, etc) before telling me and after confessing me he still went out twice with her before she found out about me. I love him so much, we talked about our plans, about marrying after I graduate and how we wanted to be together for the rest of our lives, he made me happy and I never loves someone like I love him, but I'm hurt, I feel so betrayed, I feel so naive and stupid, I can't even understand why it happened. I asked him for a break, time to think. And I don't know if I could/should forgive him. But I just can't help but miss him (bc of quarantine, I had covid recently and we haven't seen each other for almost 1 and a half months). I need some advice.