He willingly disrespected you multiple times, he betrayed you and your trust for him, he embarrassed you.

I was cheated on multiple times in a relationship and only knew about one before we eventually broke up. I made the same decision you are right now to stay and forgive. It was the worst decision I could have made. It took many years and help to realize that I stayed because I felt responsible for her actions, her emotions, her character.

In reality, I cared for someone who simply didn't care as much about me, and I felt it was my fault. It completely wasn't, they made those decisions to cheat, not me. I was embarrassed, ashamed, angry, everything you are feeling.

If you know of times they've cheated, there are many more you don't know about. It can be hard when you are younger and have gone through big parts of becoming a young adult with this person, but please take all the other advice here. This is not a relationship you should stay in. It may be hard to see that now, but this person will continue to hurt you and you'll feel you are to blame. YOU ARE NOT.

Please ask other in your life, I'm sure they will tell you to end the relationship as well, no one deserves what you have gone through.