Cheating advice

Im not proud to admit it, but im a serial cheater. Ive never been in a relationship that i didnt cheat or at least think about it. Ive been in several that we both cheated but they never find out that i do. My problem is that i want to stop but its not that easy.

Im coming into a new relationship with the guy knowing i have issues with it. The reason we arent together yet is because he wants me to be completely faithful to him. I want that too. Im just looking for some advice that could help me from talking to other people the way i should only be talking to him. Please no rude comments.