<human>: Summarize the given text in a few sentences.

My girlfriend is going to school in a different state for 2 years. We started talking about 3 months prior to her moving away. Her ex at the time decided he wanted to pay for her apartment because she won't be working. She agreed because, free rent. I understand the pros that come with this, but I have a sick feeling in my stomach every time I think about it. I'm not really jealous, however I do want to mention both me and her have Exs we are still on good terms with. She makes it known I cannot talk or hang out with my ex even in group settings. However, I know she talks to her ex at least monthly. Is there a solution to this? Am I overreacting?
<bot>: My [27 M] GF [27 F] is living free in an apartment paid by her Ex while schooling. I don't like it. Am I overreacting?