Serial Cheater

I found out today that my boyfriend of 5 years cheated again. He cheated 3 years ago, in a relationship with someone else long distance, she would visit. Now this one, also long distance, i found out about her on accident, and messaged her to find out she was staying there this weekend.

I don't know what to do. I can't see a life without him, i care about him deeply. He is in therapy. Like I care about him so deeply. But I am hurting so much.

I guess I am looking for empathy maybe. Anyone who has been through this who can be kind and not judgemental.