Hello my friends, I need your help...

I am seeing that girl, we are together since like a month and there is one little problem. She was in a long relationship with some guy, they broke up but they have like a pack of friends that they go out all the time together. I don't know these pepople, haven't go out with them yet. But it really bothers me that she is going out with her ex. I mean they don't go out only by two of them, but he is always there. For example they go to the movies: her, her ex and some friend. They hang out together... Is it normal? It was her first boyfriend, they were together for a long time, it's fucked up. I told her already that it bothers me, but didn't tell her to stop seeing that guy. She told me she doesn't care about him. They have the same group of friends, I understand they will see each other. But when they go somewhere with three people I am like: wait, what?

What should I do? Or maybe I am wrong and shouldn't care because they are not together anymore?

It only becomes a 'problem' when they are sexually involved with each other. Have you seen them together much? what do they act like? Do they act like they still have feelings for each other?

Some people can let go easily, others can't, ie everyone is different. it's not like it's completely impossible for them to still hang out and not be sexual with each other.