Ex problems

So me and my boyfriend have been on ad off since last year... He recently has been cheating on me. Three times this year I found out.. But now that he lost me for good he wants me back. Like he gonna change like he said before. I love him with everything in my heart but don't want to get hurt... What should I do??

Also, now all he wants to do is have sex because he needs it.

Plus my parents say that if I end up going with him again than I will be in big trouble.