In my opinion the only way to get over a situation like this, is confrontation. When my past lover hurt me with another woman, and she was around me all the time, and i had to have contact with her, I just took a deep breathe and said hi. I know its hard, but sweetie, if you do it once it will get easier with each and everytime. In my opinion, look your best and put your somewhat happiest face on, because i know you cared for him, but you have to realize you have to move on with your life...because you never know Mr. Right might be next to you when your ordering your drinks from your ex-boyfriend.