Ok long story short. My mom was friends with a woman who has a son the same age as me. So they tried to fix us up. His mom came to my house with him. We had a nice conversation and I was very attracted to him. He also found me attractive I later found out. His mom told my mom that he went back to his girlfriend. He actually has been going back and forth with this woman about 7 years. They were also engaged at one point.. Well at that point I left in alone. A couple months after this I found out he broke up with his girlfriend. Well I felt weird to contact him. I was insecure. What if he told his mom or turned me down. So what I did was I started to e-mail him greeting cards. Without telling
Him who I was. I mentioned him to a friend which I thought she was a friend but turned into a psycho. She started calling him a lot .Well let's say pranking him. He found out it was me and was upset about the pranks. I told him it was me because I felt that it was easier than explain who I was. HE said that he will not say anything about the pranks as long as it ends there. Well it took me three phone calls to try to explain to him at that point he did not want to listen. He said he had a girlfriend and that the pranks were still going on. I don't know if my friend was still doing it or he mixed up the days. Well the next day his mom called me. She was so nice she knew it was not me I tried to explain he best could and we left it at that. My question is If I should try to e-mail him and let him know the whole story. I just feel bad we ended it like that. I just want to explain the whole story and than forget about it... What should I do..

Forget about it. You can only burn bridges once and it sound like you've done that.
Move on from here and learn your leason.

I think you lost your chance and he probably thinks your some crazy woman making up excuses as to why your "stalking" him (even know you didn't do it)... I say one e-mail explaining it all is OK, what do you half to lose, but no more then one. And if he doesn't reply, forget about him.

... what's wrong with you all?? Look I say email him... give him the full explanation. I'll bet he ends up thinking it's kind of a cute this all happened cause you were nervous to talk to him. So email him! Sides what's giving it one more try? If you give your explanation and he still turns you down then I'd leave it at that. Try to find someone else, but give this guy one last try. I hope things turn out.

You have to know when you tried your best and know when to give up. I agree with the two suggestions above. You can try to explain the situation so at least he knows what really happened. See his response and go from there. If it doesn't work out, you know you tried. That's all you can do in life, try your best. Good luck.