I've fallen for my best friend but we both have boyfriends

ugh, ohkay, im bi, to start with. I have a boyfriend. and I love him with everything I got. but then im in love with my best friend (whose a girl) and we kiss all the time,a and he knows that, and he says as long as its just a hello and goodbye kiss, its fine. but tdy..it got more to a makeout. and I've fallen fer her, completely :/ and she has a boyfriend too, and im scared that if I tell my boyfriend, he will break up with me. and I cant just stop loving her, someone just help me please.

first of all being gay in my opinion is wrong so stick with the girl and brake up with the other dude of yours and tell him the truth of why you decided to brake up