My girl friend cheated her exboyfriend for me now can she goes back to him when her ex is chasing and calling her like any thing?When I asked her what's going on in her mind then she said she love me but she does want her ex to ruin his life for her.

We are in same colledge so her ex keeps on checking her.

*she does not want her ex to ruin his life for her..

It's up to the girl to decide what she wants to do. You can't tell her what to do.

If she doesn't want him part of her life, all she has to do is ignore him.

Run! This is not a good situation.

She went behind her ex's back to be with you-
Can you trust her when you know she is capable of this?

Anything she tells you about him can be seen as a potiential lie,I bet if you talked to him you would get a whole different story
She's a player