Just 2 Month Before My Girlfriend Got Married Due To

Just 2 month before my girlfriend got married due to her parents pressure and she totally forgot me. But I m unable to forget her throw out the day I m remembering her sometime I m getting angry on her that how she forgot me so easily. I want to forget her . otherwise I ll do something to her or else to myself.
I m feeling like destroy her life and sometimes I feel so much love for her. What to do tell me.