Confusing problems...

Okay so I need your help...

I'm confused with what my heart thinks...

I am not sure who I love out of two people...

The first person was in love with me as well but he had a girlfriend. He made me a promise that he would always love me and that nothing would ever change that. He also told me it would be impossible for him to get mad at me. On May 26, 2009, he hurt me and broke the promise. He has been mad at me ever since that day and I don't know why. Don't know what to do about him because I am in A LOT of pain!!! But I also did something stupid today!.. Me and Denesse Stoops were going to go say good-bye to the A-trackers. Denesse asked me if I was going to say bye to him and I said "F*** him he hates me anyways". She said, "Are you sure? He's right behind us." Then, all of a sudden, all of the pain he had given me made me furious and I turned around to face Denesse and I said, "F*** (His name here)!" And, guess what, he was right behind Denesse and I could see his face and he looked devastated. I feel so bad and mean and guilty... AHHHH!!! Why am I so stupid?!?!? .-. 10/23/09

The second person has a girlfriend and says that he is in love with my friend and it hurts because she loves him back and when I see them together it's like someone is stabbing me with a lot of torture... I think I should forget about him since he will never love me...

WHAT DO I DO?!?!? :(

My heart is 50% for the first one...

And 50% for the second one...

My heart still prefers the first one even though he's put me through more pain than the second one...

I don't know what to do...

Should I follow my heart?...

HELP PLEASE!!! ;(