Why is love so painful?

I have this guy friend that I have had a strictly intimate relationship with for about three months now. when I talk to him, that is all he wants. he is so sweet and flawless. I think that I have fallen in love with him. but he has a girlfriend. I feel...

stupid and humiliated. that I let this happen to me. I went over there to see him last night even though I knew this and what his motivation was. I hate myself! what can I do to make this better and make the humiliation go away???

talk to him, tell him what do you think. im sure that he will solve the proablem !!

Is he the same guy you';re seeing who knows your co-workers?

Leave him alone. He's a cheater. He has a girlfriend. Let's say he dumps his current girlfriend for you, how would you know that every time he leaves the house he wasn't going to his OTHER girlfriend's house?
Sorry to break it to ya, but you're technically, his mistress. Just dump him. He's taken. You don't mess with a taken man, okay. Didn't your Mom ever tell you that?