Okay manda27 - here goes - you asked so i'm going to give you my honest opinion
-First, your relationship was built on trust and non-commitment. You can't be surprised that he did the same things you started out doing.
-Second, if you take him back you both need to establish what you want in a relationship, and then you both need to decide if you are able to fulfill that for each other
Third, the relationship was built on lies so you never had a relationship
I can't tell you to forgive or move on, all I have to say is if you don't want to be with each other only then don't. But, if you do then just be together - And if you cheat -please protect yourself and I don't want to see yall on Maury!