really hurt and insecure

Well first I don't want rude comments for this I know it was wrong. But for a while now I've just been feeling really insecure about myself because I use to be this petite girl now I'm 30 weeks pregnant so I'm carrying a basketball with me. And I've been breaking out like crazy I just haven't felt that good. And my boyfriend has hardly had sex with me since I've been pregnant especially since I've got bigger. Well a while ago I looked to see who he was following on instagram and it was a ton of girls. Like girls he doesn't know but around the area, half naked or fully naked girls, girls he knows I like hate. I got on his phone and unfollowed them. He did the same thing on Facebook just following pages that has half naked girls. I also seen he had a tumbler account but I didn't think to look at it because I didn't know what it really was until I made one to see what it is. And I seen you can follow people. So last night I got on it to see who he's following and it was over 100 girls or pages dedicated to girls, and they were all models or porn stars. I pretty much cried after that. It really hurts my feelings because I really feel like I'm not pretty enough for him and never will be. He always says he likes "nature girls" but all he looks at are girls with the perfect everything. Like I've looked up how much it'll cost to get my breast done, how much it cost to get laser stretch mark removal after I'm done having kids probably. I just don't know. Our relationship is great besides this and I know for a fact he's not cheating nor has any intentions to. But it really hurts my feelings he feels he needs to look at soooo many other "perfect" girls and doesn't ever want to have sex with me, and he doesn't ever tell me I'm pretty or anything. I can't really remember the last time he told me that besides recently when I expressed that I don't feel very good about myself. But then he does stuff like this right after. I just don't really know what to do about it. It kind of makes me depressed how insecure I've been with myself.