Don't her all depressed over a guy (or a girl) from your past. That's like being sad because the garbage man picked up the trash. ---Not saying they are/were trash, but saying it is over, do not dwell.
This especially applies for me. because i do NOT normally tell people my problems I have to trust you a lot. & I don't trust people very easily so if I tell you my problems. You are EXTREMELY important to me!