I am happy with my boyfriend and do not want our relationship to end. Yet, I am so drawn to his friend. Can't get him out of my head, despite my years of trying. The three of us always hang out together and I can't help but think this guy might like me too, seeing as he hasn't had a girlfriend (or anything even close) in the 5+ years I've been spending time with him (and my boyfriend together). Whenever he talks about women in front of me its always like I'm "one of the guys", yet sort of testing me like maybe I'll be jealous if he shows interest in another girl. Sometimes I get along better with him on an intellectual level than my boyfriend, we have inside jokes and when we get talking, we can't stop. Our sense of humor is simular. Then again, I have never said anything to him, or my boyfriend, about any of this. I don't know for sure, but I got an anonymous message saying someone was interested in me but couldn't act on it, and I think it was him. Probably when he was going through a tough time and possibly drunk. Its like we have an un-spoken agreement between us...recognizing our mutual attraction and also the fact that nothing can be done about it, so why bring it up? We could never hurt my boyfriend. But when I'm near his friend its almost like an unbearable electricity, magnetic. I'm drawn to him. And then we're forced to repel. The only way I've found to forget it is not to see him. I can go months without caring if I don't see him but then the second he makes a joke I get and my boyfriend doesn't, the second he does something subtly and almost regrettably romantic, it all comes back. its like he actually TRIES to not like me, and I try not to like him. I will go through phases of convincing my boyfriend not to bring him with us places, just to avoid the awkwardness of the attraction I feel. Anyone else got a simular story?

So my advice to you is to stick your bf, cuz I'm sure if ever you leave him for his friend you'ld find that his friend will stop being as attactive as he used to be cuz he will be the one in the game now.
also, guys do like competition. he might just be trying to attract you for his own pride just to know that anything his buddy can do he can do too.
Yes it's normal... and my advice, take wowmemy's advice coming from a guy being honest about how guys work.
Know that it is 'normal' but also that it means absolutely nothing except that you are human. You're in a long-term relationship that is not worth saccryficing over something that has absolutely no certainty. Especially if this guy is willing to try to push you. He's not a true friend, for starters. And furthermore... would you really want to chance a relationship with someone who would stoop so low?!