So here's the situation: I'm a recent grad and got a job in a city where I don't really know anyone except my girlfriend who lives in the city and some of her friends from the area. I'm a pretty social guy and make friends very easy, but am finding it hard to make friends in the "real world" that I actually like and can relate to. I do know a few guys in the area from work etc, but we don't really have a ton in common so we never really hangout. Anyways, I met this chick that works at a Planet Fitness I go to and we immediately hit it off. She seemed really chill and down to earth and after seeing her there a few times she asked for my number (because we're both recent grads looking to make friends in the area etc) and yesterday invited me to go get food with her and her friend. She knows I have a gf and still seemed cool about it, and I wouldn't mind having a few of my own friends in the area, but is it sustainable? I feel like it's impossible to be friends with a girl if you already have a gf. There's been a few chicks I stopped talking to because I figured it wouldn't work out and I kind of regret it. Also if you were already friends with a girl before you started dating your gf, or know someone from work I think that's a different story and more normal. What I'm talking about is making friends with a girl once your already in a relationship and outside of work. What do you think?
*Note: My gf also knows about this chick and doesn't really care, she knows I am very social so she understands that I need friends or I go crazy.