Hi Cherry, sorry you are here.
Your H seems to be a pretty committed serial cheater. That is a breed of its own and I think you both need to look into professional counseling. Serial cheaters are a tough fix if even possible. Your WH is addicted to the rush these affairs give him and his recovery, if possible, has to be treated as an addiction. If he does not want to end this destructive behavior it won't happen.
The first time I caught him was when we were dating and living together.
Second time... We were engaged
This was a huge red flag.
I would start by getting the book Surviving an Affair by Harley. Then I would strongly advise a session with the Harleys.
Until then, read here and get started on a Plan A. He told you about his needs for admiration and affection so you have a start on his emotional needs. Avoid love busting behavior. Learn about boundries because your WH does not seem to have any in this relationship.
I love him so much and he is a great dad.
Statement A (implies you wish to remain married) oh, and forgive me but in my opinion great dads don't cheat on their chidren's mother.
Maybe I have a hard time investing myself fully to someone who I feel is just going to hurt me again.
Statement B (does not support Statement A and will not help in rebuilding your marriage)
I cant get it out of my head him bringin someone to his parents house or to meet my kids.
Have you exposed his affairs to his parents? Will they support you and the kids against his behavior?
I dont believe he has ever physically cheated
Be prepared for bad news about this one too.
Start reading the concepts on this site and get SAA soon. At the top of this forum page is several great threads to assist the new people to this site. To the right are links to some of the most important concepts.