My very weird situation

Straight to the point. I'm 17, conservative, insecure from bullying, trying to fit in to keep the few friends I have and I'm gay (hiding so deep in the closet I might as well be in Narnia). He's 16, in the grade below me. Bisexual I think. ADHD, has no EQ (so he says what he thinks and doesn't know when to stop sometimes), a nice person but a bit beaten by bullying which had made him do drugs and alcohol.If it weren't for our mutual friend I would never have hung out with him during the holiday becuse our morals do not align at all, if he even has any. At school I avoid him because of the hierarchy and because he's unpopular while I'm a bit of an insecure a-hole.We never hang out unless our mutual friend gets us together. And we always end up sleeping at his house. His parents love us for not bullying him (yes that's how bad it is). whenever I do sleep his house though he End up having sex. Not anal though. He is bi and does it for the good feeling I'm just gay and want to try everything.I know he has had straight sex and has another friend he had done some gay stuff with. I'm just not sure if what we're doing is right. We barley consider each other friends and his morals are no where beer mine. Yet we have sex. What do you make of this. Should I stop the whole thing. I know that if I call him right now I can sleep over tonight and have sex with him. So you can see the temptation. Sorry about the essay.