I was in a similar position a few year's ago. Check my history for the story.

I dated a ML for 1 year and she was cheating on me the whole time. Now she is living with another guy with she had a baby. She contacts me to fuck her and I do sometimes, but now I'm not chasing her. She's after me. When I was broken I looked for other girls and that helped me get over it quicker. I found a few other girls that I have a lot of fun with now.

I'm not saying to get your hopes up but think of the future. You're in control. It sucks for but you will be stronger and wiser

My story is here if you're interested. http://www.aus99forum.com/showthread.php?76972-What-happened-to-me-Love-or-not-PART-2-Update