how do I[f25] address boundary issues with my roommates [f32/m34]?

My[f25] boyfriend[m27] and I live with his sister[f32] and brother in law[m34] as we have for a few months now. His whole family has always been super kind and welcoming to me the 3 years we've been dating, and I hate to complain at all with how accommodating they've been (we also have a dog) however I can't help but feel uncomfortable with a few instances where they just seem more used to being around each other than I am- his sister doesn't often knock? sometimes she will stand outside and talk as a heads up but will otherwise just walk in. the first time we put a new cabinet/dresser in our closet she let herself into our room and into our closet to rummage around and look (She did this at our old apartment as well) they have their own shower and bath in addition to a second bath upstairs, but will use ours frequently in the AM because it's near the clothing steamer downstairs, including our shower and my hair tools. they are up just a bit earlier than I am for work or my BF for school but they will have full blown convos outside out door downstairs, play music etc. (7am or earlier) I've never had an issue with sharing food before but she will try to buy healthy snacks for herself, and then swoop in and finish off our other "normal" junk snacks or food. only slightly a bother for me because I have a different (vegetarian diet) than anyone else in the house and sometimes I buy high-protein specific snacks on days we don't cook. which I've mentioned. brother in law made a comment about me being "nippy" as a joke when my boyfriend let slip I was wearing a sweater upstairs in the summer because I wasn't wearing a bra. (I was cold too!) And most recently- she threw our finished load of laundry onto the living area couch while we were sleeping. I didn't have time to fold laundry with work until later in the afternoon, where I found the brother in law taking a nap on our clean laundry... I'm always pretty prompt in making sure not to hog the machine, and the one time I had to move their laundry (because she had left the same load in there for 2 weeks) I folded it neatly for them into a basket for them to carry upstairs. so I was a little surprised to see she had done that. not to mention there was plenty of other spaces on the couch he could have used, and a WHOLE other couch upstairs next to their bedroom. I also realized after he finally got up that my underwear (lacy thongs) were right on top where he was and that made me feel uncomfortable.

I don't want to come across as ungrateful as I know my boyfriend has talked to them about stuff similar in the past, but he also doesn't seem as bothered at the moment and I would like to figure out a cordial way to address these stupid small issues.

thanks!

tl;dr roommates have habits that make me uncomfortable, how can I keep peace when they are also related to my boyfriend?

Submitted September 16, 2019 at 11:33PM

My[f25] boyfriend[m27] and I live with his sister[f32] and brother in law[m34] as we have for a few months now. His whole family has always been super kind and welcoming to me the 3 years we've been dating, and I hate to complain at all with how accommodating they've been (we also have a dog) however I can't help but feel uncomfortable with a few instances where they just seem more used to being around each other than I am- his sister doesn't often knock? sometimes she will stand outside and talk as a heads up but will otherwise just walk in. the first time we put a new cabinet/dresser in our closet she let herself into our room and into our closet to rummage around and look (She did this at our old apartment as well) they have their own shower and bath in addition to a second bath upstairs, but will use ours frequently in the AM because it's near the clothing steamer downstairs, including our shower and my hair tools. they are up just a bit earlier than I am for work or my BF for school but they will have full blown convos outside out door downstairs, play music etc. (7am or earlier) I've never had an issue with sharing food before but she will try to buy healthy snacks for herself, and then swoop in and finish off our other "normal" junk snacks or food. only slightly a bother for me because I have a different (vegetarian diet) than anyone else in the house and sometimes I buy high-protein specific snacks on days we don't cook. which I've mentioned. brother in law made a comment about me being "nippy" as a joke when my boyfriend let slip I was wearing a sweater upstairs in the summer because I wasn't wearing a bra. (I was cold too!) And most recently- she threw our finished load of laundry onto the living area couch while we were sleeping. I didn't have time to fold laundry with work until later in the afternoon, where I found the brother in law taking a nap on our clean laundry... I'm always pretty prompt in making sure not to hog the machine, and the one time I had to move their laundry (because she had left the same load in there for 2 weeks) I folded it neatly for them into a basket for them to carry upstairs. so I was a little surprised to see she had done that. not to mention there was plenty of other spaces on the couch he could have used, and a WHOLE other couch upstairs next to their bedroom. I also realized after he finally got up that my underwear (lacy thongs) were right on top where he was and that made me feel uncomfortable.I don't want to come across as ungrateful as I know my boyfriend has talked to them about stuff similar in the past, but he also doesn't seem as bothered at the moment and I would like to figure out a cordial way to address these stupid small issues.thanks!tl;dr roommates have habits that make me uncomfortable, how can I keep peace when they are also related to my boyfriend?