My boyfriend and I have been together for a little over a year.

He has moved cities and now works in the came city where his sisters university is. Because of this, his parents made him share a studio apartment with her (they guilt tripped him and moved her in after he found the place) . They pay for half the rent, and give her money while he's expected to get by on his own.

My boyfriend isn't happy about his living situation, but says he currently doesn't have other options.

His sister has always been the golden child, and he's expected to sacrifice everything for her, even thought she just uses him. She's also extremely jealous of me, and has to comment every time I get something from him like - Oh wow, and he doesn't care about his sister/Yeah and you forgot about me.. etc. There were some situations where she also commented negatively on my body when my bf was giving me a compliment. BUT!!

The main problem I have now is how much of a soft spot he has for her. He's aware that she's selfish and manipulative, but he can't say no to her or set any reasonable boundaries.

For example : They agree that he'll make lunch and she'll wash the dishes. He does his part of the deal, and leaves to go home for a couple of days while she stays in the apartment. When he comes back, the oven tray is still dirty and hardened with oil and pieces of meat inside. While he did text her about it, he washed it by himself in the end.

When he makes snacks for the both of them, she'll only wash her own plate and point out that she should wash his.

One time, he asked her to hang the laundry to dry while he cooked. After that, he went home for 4 days. When he came back, the laudry was still in the washer all stinky.

She simply doesn't care. Also, it's worth mentioning that he's the one who pays for groceries too. Their parents give her money that she spends on herself, while he pays for most of the things for the apartment with his paycheck. They haven't given him any money since he got his first job (when he was 16) while she's not expected to work or pay for anything herself.

I'm aware that he still cooks for them both, even thought he works a full time job. Because of this, we can't text and speak as often as we used to.

Also, when I go visit him (while the sister isn't there) I'll help him out around the house, with ironing and hanging the laundry. I don't feel like doing this anymore - I go there and help him out while she gets to do nothing and get everything handed to her on a silver platter.

I'm conflicted about this and I feel like I'm losing respect for him. We've also had some other issues regarding communication and I feel like it's just getting worse and putting the strain on the relationship. I feel bad for him since he really has had many issues in his family about this - but they just expect him to sacrifice himself for her.

When I point out the unfairness of the whole situation and how he shouldn't do all that, he tells me I just don't understand it, and that it's his sister, not just some random person. He tells me that I can't understand where he's coming from since I'm an only child, and they're twins. I don't want to look jealous, and I wouldn't have a problem with him treating his sister nicely if she was good to him. IMO this just crosses the line since he's doing all the work because of his 'duty as a brother'.

People with siblings, how do you feel about this? Would you do anything for your brother/sister even if they treated you this way?