Finding an lost friend

Hello everyone, hope you are doing well. There's something that really troubles me and I really need to share it and listen to someone else's mind.

I'm 29. I live in Greece, however I'm half American. I grew up in a small town (in the US) but left at 17 with my aunt and went to Greece. Before that, I was with my father who was abusive. Thankfully, I made some good friends that we shared some issues (abuse, bullying etc, each one had its own). We were something similar to the loser's club if anyone of u knows the movie ("it", s king). When I came to Greece I lost my friends and most importantly, my pal. We got to talk again some weeks before and since then.. dunno.. I felt like I was sleeping and I woke up from my slumber. We couldnt find each other on social or anywhere, I thought we would never talk again, but he found me by chance. I keep on thinking "what am I doing here?". I have a gf and a job but something just tells me to return to the States. It sounds foolish and I dont know why i feel that way..