Should they be together?

It is good that the girl knows the guys history so it’s her decision to make, the guy may have learnt his mistakes and be willing to change his ways in his next relationship. As long as everyone knows the facts, they can make their own decisions

She wont listen to me when i tell her about his history

You know a little too much, this about you?
Anyways, regarding the question, I think a little more time would be needed to those two. They’ve both left long relations, girl got cheated on, guy she likes now cheated with several girls…. I wouldn’t advise but you never know, time will tell.

No she shouldn’t what he did to the girl before he’s gonna do the exact same to her she’s no exception

This guy and this girl have been talking for about a month.
Before he met her, he was dating this one girl for like forever and the two broke up because he cheated on her with several girls. Before she met him, she had been dating this one guy for like forever and he cheated on her so she ended it. She hates the guy.
This new girl really likes this new guy and has been warned about his history.
Should they be together?

What factors should be taken into account when advising friends who are navigating new relationships after experiencing betrayal in their previous ones?

That's what I feel like is going to happen, and she doesn't deserve that again. Whenever she sees her ex somewhere, she is extremely heartbroken. I hate to see her like that.

I know its not my decision, but I'm trying to look out for her. Hes the type of guy who "gets bored" with girls very easily, and I'm trying to spare her even more heartbreak.