<human>: In a 8 month relationship with a beautiful girl.

I like her a lot. She likes me a lot. Shes foreign from Russia and plans on visiting this winter or next summer. For how long I do not know. 

What scares me is that her hometown is very small and her circle of friends includes her ex bf. She keeps in contact with them via facebook and instagram to upkeep her relationships. When I'm with her I sometimes feel insecure at the thought of her going back home. I don't have a reason not to trust her. 

How do I stop this poisonous thinking?

Can you provide a brief overview of the text?
<bot>: Gf is planning on visiting her hometown because she is homesick. Her circle of friends includes ex bf. I am insecure about it.