Need Advice: Caught Girlfriend (26F) in a Major Lie, and a weird relationship with a friend.

Hello everyone, I've been a long-time lurker, but this is my first time posting. I need some advice regarding a relationship I'm in. I (25M) have known this girl (26F, let's call her A) for a year now. Everything about A was amazing until two months ago when we started dating. I am serious about her and want to marry her as soon as we both know each other well enough. However, I'm facing a few issues and don't know how to navigate them.
Recently, A took this examination, and her result was out a couple of months ago. She failed in every paper with huge margins, but the problem is that she showed everyone a different result that turned out to be fake and edited (she still showed everyone that she failed but just one paper and by barely a few marks) I discovered this from a mutual friend, who heard it from another mutual of A (let's call her M). A initially denied it, claiming that M was lying because he had feelings for her and she rejected him (this is another shock which we will come to later). After a lot of confrontation and a day later, she finally admitted to the lie.
While I understand that she lied out of embarrassment, but the act of actively editing and showing a fake result to everyone is concerning and going an extra unnecessary mile. Moreover, I've noticed a pattern of half-truths and hidden information from her, which is making me lose trust in her. I have started to question everything she tells me and has told me in the past.
Adding more about M – I've never met him, but A always spoke highly of him. He's a close friend of hers and has been dating her best friend for a couple of years. It was surprising when A revealed that M used to send her suggestive messages and shirtless pictures while he was still in a relationship with her best friend. According to A, she quickly shut him down.
When I asked A why she didn't inform her best friend about M's behavior, she explained that it's typical for M and his girlfriend to blame the other girls involved when he's caught. She felt that her best friend would likely blame her, so there was no point in disclosing it.
My second question was about why A maintained a friendship with M despite his inappropriate actions. A's response was vague, stating that she had forgiven him. I find this confusing, especially considering the nature of M's behavior. It's unclear to me why A didn't block M when he started sending such messages and pictures, and why she consistently portrayed him in a positive light.
Adding more about us – I've never been in a relationship before. And discovering that a partner has been physically involved with someone before marriage is a dealbreaker for me, which I have communicated with A. On the other hand, A has had an ex. Their breakup was due to the ex being physically involved with another girl. A emphasized how clear her boundaries were with the ex. However, my concern arises with A's comfort with lying and how my gut tells me that is hiding a lot of stuff. Additionally, given that M sent her suggestive messages and pictures, I find it puzzling that she didn't consider it a big enough issue to cut him out of her life. This situation has left me with many many questions, and I'm uncertain about my feelings toward A and what to make of the entire situation. (Took help from Chat GPT to make my writing clear)

Submitted December 21, 2023 at 12:11AM

Hello everyone, I've been a long-time lurker, but this is my first time posting. I need some advice regarding a relationship I'm in. I (25M) have known this girl (26F, let's call her A) for a year now. Everything about A was amazing until two months ago when we started dating. I am serious about her and want to marry her as soon as we both know each other well enough. However, I'm facing a few issues and don't know how to navigate them.Recently, A took this examination, and her result was out a couple of months ago. She failed in every paper with huge margins, but the problem is that she showed everyone a different result that turned out to be fake and edited (she still showed everyone that she failed but just one paper and by barely a few marks) I discovered this from a mutual friend, who heard it from another mutual of A (let's call her M). A initially denied it, claiming that M was lying because he had feelings for her and she rejected him (this is another shock which we will come to later). After a lot of confrontation and a day later, she finally admitted to the lie.While I understand that she lied out of embarrassment, but the act of actively editing and showing a fake result to everyone is concerning and going an extra unnecessary mile. Moreover, I've noticed a pattern of half-truths and hidden information from her, which is making me lose trust in her. I have started to question everything she tells me and has told me in the past.Adding more about M – I've never met him, but A always spoke highly of him. He's a close friend of hers and has been dating her best friend for a couple of years. It was surprising when A revealed that M used to send her suggestive messages and shirtless pictures while he was still in a relationship with her best friend. According to A, she quickly shut him down.When I asked A why she didn't inform her best friend about M's behavior, she explained that it's typical for M and his girlfriend to blame the other girls involved when he's caught. She felt that her best friend would likely blame her, so there was no point in disclosing it.My second question was about why A maintained a friendship with M despite his inappropriate actions. A's response was vague, stating that she had forgiven him. I find this confusing, especially considering the nature of M's behavior. It's unclear to me why A didn't block M when he started sending such messages and pictures, and why she consistently portrayed him in a positive light.Adding more about us – I've never been in a relationship before. And discovering that a partner has been physically involved with someone before marriage is a dealbreaker for me, which I have communicated with A. On the other hand, A has had an ex. Their breakup was due to the ex being physically involved with another girl. A emphasized how clear her boundaries were with the ex. However, my concern arises with A's comfort with lying and how my gut tells me that is hiding a lot of stuff. Additionally, given that M sent her suggestive messages and pictures, I find it puzzling that she didn't consider it a big enough issue to cut him out of her life. This situation has left me with many many questions, and I'm uncertain about my feelings toward A and what to make of the entire situation. (Took help from Chat GPT to make my writing clear)