She did me wrong!

My girlfriend has done the worst thing anyone can do. This girl and I were first loves 8 years ago. We finally got back together. She was pregnant two weeks after we got together. She made me believe it was mine. 4 months later, she tells me the truth. That she was with her ex right before we got together. It might be his. She leaves the state. Well she gets an abortion behind my back. I wanted her to stay with me and have the baby. A few days later she reviels that she also cheated on me 3 days after I went to pick her up from another state!!! AND HER TWO KIDS :( This girl hurt me bad... If someone does you wrong, don't think that they won't hurt you more because they damn sure will!