Love is killing me
So for some reason i met this girl, we got this chemistry, like we really get each other, we understand our emotions and we like so many similar things and hate others. So we felt in love and everything was perfect until she decided to tell me about someone else who she had been in the past. After she revealed her past relationship. which was the kind of relationship that isn't seriously at all, They just slept like to satisfy their needs, I felt this anger inside, this great sadness in me, this pain that is killing me right now, I love her so much that i don't know what to do. What to change, Im so grateful she told me but i feel so hurt inside, i don't know what to do. What should I do?