<human>: Can you provide a brief rundown of the text in within 3 sentences?

Her and her ex broke up 4-6 months ago (I forget if it's Nov. or Dec.). She told me when we first started dating that he had a new GF and that she was totally over him and already had her 'rebound,' and is looking for something long term.

We currently both live near her college and yesterday he drove her 1 hour back to their hometown because her mom cancelled last minute. I forgot to mention he's single now. She told me they sung along to Taylor Swift, and also revealed they borderline text each other frequently. Not as much as she texts me but still.

I've told her that I pretty much have gone no contact with all my exes because it's awkward for me to view an ex as a friend. She doesn't feel the same and I respected that.

She asked me if I was 100% okay with all this, and I told her that I am uncomfortable because I have never met this guy and based on how I view exes it seems weird to me. I told her that I'm not going to ask her to stop contacting/hanging out with him, but I may eventually want to meet him and depending on how that goes I may change my mind on how comfortable I am with it. 

Is it inappropriate of me to feel jealous/worried that my GF is spending time and regularly being in contact with her ex? Am I over-reacting? Is it fair of me to ask her to cut ties with him so early in our relationship? Am I thinking about being too controlling? 

This is a new relationship, and I've been a bachelor for a few years so I don't know what's appropriate behaviour by either of us.
<bot>: My 1.5 month GF hangs out with and texts her ex of 4 years. I am uncomfortable with it. I don't know if my reaction is inappropriate or her actions are.