Thank you Sunrise and Dirius for your replies.
Looking at my horary, I've mistaken Libra for Aquarius *smacks self on the head*
Let me explain the situation here. He is my ex, we were together for 6 years, from 2000 to 2006. I was with my bf when my ex saw me at a gig on Saturday night. My ex and I never had a real conversation after our breakup. I am guilty for leaving him without a good reason. I had problems with my studies and I was nervous, so I let him go, and I could never forgive myself being foolish and losing him over a nonsense and pressure I had from my parents to finish my studies. He was very sweet to me, he was my first, I'll always remember him and think good of him. He had everything I wanted in a man, but yet I was foolish and young to realise that and now it's too late.
After our breakup we would shyly say hi to each other in the street. Two years ago we exchanged a few polite phrases at a wedding we both attended. Four months ago, when I was at pub with my bf, he was there with his friend I know. His friend was very happy to see me. He came to me, sat next to me, and we were talking about our lives. His friend even asked me if I got married.