Man up and don't be a pusssy, you only dated for 10 months, are you really sensitive or something, do you not have friends? Maybe she left you cause you were too needy. You don't live with her and you don't have kids with her, not sure what's so hard about moving on. Take it as a learning experience and focus on doing well in life, focus on finishing school and working toward your future. Work on yourself and love yourself. You should be happy this happened now after 10 months, what if it was 5 years. No need to get revenge by sleeping with her friends, that won't help at all, just be happy for her and don't wish anything bad on her, karma. It may hurt a little now but if you focus on life and your goals, the feelings will drift away.
