How to stop thinking this way?

I've been w my boyfriend for 2 yrs. I'm 16, he's 17. We're crazy in love, we understand each other to a point where its ridiculous, we finish eachothers thoughts without even knowing what the other was gonna talk about. And bc of this, for a while we both kind of withdrew from everything else and spent every waking moment together, in his room, with nobody else around, just me and him, bc we loved eachother so much I guess. But now, I've realized all these problems I have. If he doesn't want to be with me and just hang out with some friends, I feel betrayed and hated. If he just wants to go home, I get this lingering feeling that he hates me and wants to breakup. I always feel like he wants to break up with me and I have anxiety really bad which makes it worse. Its reallllly hard because I have a lot of emotional problems, both parents are alcoholics + abusive , and an anorexic brother and have no girl friends , just a couple guy friends that my boyfriend hangs out with. its really hard because whenever we want to do something seperate of eachother I feel distant, betrayed and hated. I understand that I shouldn't think this way at all but I can't stop. Please help me? Also when I just try to hang out with a friend that's a girl I feel extremely awkward and just wish my bf was there the whole time.