Ranting

So my boyfriend has a daughter from a previous relationship and then we have our daughter. I’ve known from the beginning that his mom favors his sisters daughter and his oldest over ours. For example for Easter she wanted to buy our girls dresses that made his nieces dress pop out. I felt that was wrong; simply bc it shouldn’t be about her they should all have their own dresses and not have to make one or the other pop out or stand out more. Then for his oldest birthday party we planned ours and his baby momma planned hers. Well we both invited them and usually they go to both, this time they’ve not even mentioned coming to ours or nothing. They never ask about my daughter, have seen her three times in almost four months and not because of covid, bc they could even video chat us to see her like they do his oldest or niece. I know for a fact that they don’t like me, even tho he says they do. Simply because a couple weeks ago his ex tried texting him, which also happens to be his sisters bestfriend and I know his sister gave her his number. Well I snapped out on his ex and all of a sudden they haven’t talked to us since. Barley even told him happy birthday. I also feel that they may be jealous of us getting his oldest, him and his baby momma had an argument and she didn’t let us get his daughter for about a year, now we get her again and I feel their mad. Simply because any time she’s around they try to parent. His mom and sister and brother act like they are her parents and like he doesn’t know how to be a dad. He gets angry about it but won’t say anything. I feel like I should cut them outta me and my daughter life, but he doesn’t see them as playing favorites or anything. There was also a lot of issues while I was pregnant. For example I lost 30 lbs until 30+ weeks so I ate whatever I wanted like my dr told me to help gain my weight back, they looked at me while we were eating at Burger King which his family wanted to go to, and told me I was gonna her overly fat for eating junk, while I was trying to eat. I have body image issues already so for the rest of that day I couldn’t eat, then they’d yell at me for not eating. I just feel like I’ve had enough. Should I cut them out or let it all go?