freedom borders in a relationship

Hello

So there is a girl I like a lot(we both are 22 years old). We are dating for about 1.5 months. Her long-term relationship ended not so long time ago.About 3 months or something.( i know its a bad choice to date a girl after broken relationship, but its happened like this).
The problem is, that there is another guy who she knows for a long-long time and they have slept few times after here relationship got broken. He wants to be in relationship with her. She doesnt. But she still wants to be friends with him.
I dont know what should I do with this situation .
Should i just say, that she cant stay friends with him?(i always thought,that jealousy is not very constructive feeling, but how can I really let her be friends( spend some time together and e.t.c) with a guy she has slept before ? )
Or should i just ignore this fact and try to be best for her as hard as i can and time will show ?
Or maybe something else ?

Than you!

You cannot control her. You can make your feelings known - REAL feelings: "I'm not comfortable with this", and she makes her own decisions. You can accept her decision or not. If not, walk. Don't play games, don't make threats, just tell her your feelings on the subject, and make your own decisions based on hers.

Tell her what you feel.
You will be surprise what the answer is.