<human>: Can you provide a brief overview of the text?

So my girlfriend of 9 months recently moved away for college. She is a 4 hour drive away so it's a bit long distance but we've seen each other most weekends. Recently a guy she previously knew started talking to her again and they've begun to hang out a bit. 

I not sure how two feel cause this guy has previously told her that he had feelings for her (previous to our relationship). When we began our relationship he stopped talking to my girlfriend until recently (she lived away from him in the same town I'm in) . They caught up for coffee and had a chat. 

My girlfriend told me he stayed away because he didn't want to sabotage our relationship. They have hung out twice both times just the two of them at coffee shops. I'm just not sure how to feel.. It makes me a bit uncomfortable (which I've communicated with her) but not sure if I should be more worried. I trust her completely... But him not so much. Guess I'm just asking how I should approach the situation.
<bot>: Girlfriend is hanging out with a guy who previously said he had feelings for her and I'm not sure how to feel