Lost Virginity! Now I'm having a break down. Help?

I recently lost my virginity to the wrong guy. Three days after, he was already with a new girl. He was a total jerk and has avoided me since I found out about this girl (and others). I wasn't expecting a relationship after our hook up, I also wasn't expecting to get this attached, go through this emotional breakdown, and be this hurt by him moving on either. Any suggestions on how to get over this??