Something's wrong with me

So recently, I found out my best friend who's a guy has been hanging around my ex friend. This girl tormented me and hurt me so bad. But when I found out my friend was hanging out with her I got so upset! I started acting all petty. I like him but I don't want to ruin our 11 years of friend ship. I told him that our mutual friends know I was gonna give him a chance- he totally spilled his heart out to me... But I think I'm either bisexual or asexual.