My situationships roommate is talking shit about me behind my back

So I (f22) have been talking to this guy (24) for a few months. We actually used to talk back in January, but stopped talking for a while. We’re not officially dating or anything, but I think we’re in a situation that we’re both content in and aren’t sleeping with other people.

Well im fat, and yeah this is something I don’t like about myself and am actively working on, but Im okay with who I am.

Well the guy im talking to we’ll call him Tyler for the sake of less confusion, told me the other day his roommate was talking about me. He didn’t really go into too much detail, but of course I started over thinking and got into my head. I knew it was probably because of my weight.

Well the next day Tyler and I were getting dinner and he kinda just told me what he said. About how his roommate didn’t want me to party with them because I’m bigger, how he thinks Tyler is stupid for talking to me because I’m fat, that I don’t have any friends and hang out with weirdos because of my weight (he’s never met any of my friends), and talking to all their friends that come over about me.

First off, I have no interest in partying with them. I have my own friends and interests. I’ve never really actively tried to go out with them either. I know Tyler has wanted me to go, so I bet his roommate assumed I was asking.

I just don’t understand. I feel like I’ve been really respectful, I’ve been really nice and treated their space and apartment well. His roommate has been nice and friendly to me when I’m around too so I just don’t understand. I’ve had enough guy friends to know when they just want to hang out with the boys or whatever, and would never had an issue if they just didn’t want me around when they were all hanging out. I think Tyler just wants me there with him more than anything else.

I don’t expect him to nor does he need to like me, but I don’t understand why he is going out of his way to say things about me. Like why can’t he mind his own business.

As for Tyler, he told me he stood up to me when I asked about it. And honestly from how he’s reacted to it, he doesn’t really seem to care about me being fat. I know it’s not really his fault it’s just an upsetting situation. Like now I don’t even want to go over to his place or be around his roommate which sucks because they are friends. And I wouldn’t ever expect him to stop being friends with him either because I am just not the type of person who wants to get between a friendship.

Idk I just don’t really know what to do. I’ll still go over there and just not talk to his roomate, I have no interest in or feel no need to make an effort to be friendly with him now. I just don’t know what I did to make him hate me so much. And I really don’t want all of Tyler’s friends to start not liking me because of what his roommate is saying.

I kinda just wish Tyler never told me, but from what my friends have said, it’s probably a good thing because he probably wouldn’t have said anything to me if he agreed with him.

I don’t really know what to do.