how do i decide between my ex friend and girlfriend.

Dude, i'm in the same boat. I'm telling you from experience. DO NOT BECOME HER FRIEND. Stay with your girlfriend. Do not take chances like that in a relationship. keep it healthy and secure. do not invite problems into your life.

First of all, why do you want to be friends with your ex? Think about what you're doing. Will your choice hurt your girlfriend? If you're afraid that you might fall for your ex, then you shouldn't become her friend.. do it for the sake of your relationship.

I think if you have to question becoming someone's friend again you shouldn't do it. Especially if you think there might be a chance of regaining feelings for that person.

Is your ex-friend your ex-girlfriend or just an ex-friend who is a girl? I don't know how long you have been dating your current girlfriend but if you feel that you may develop feelings for another girl maybe you should take a break from the relationship to think of who you want to be with? The important decision for you is to know who you want. If you really loved your current girlfriend (I'm telling you) you wouldn't be having feelings for your ex-friend like you do. You need to talk to your ex-friend to know how they feel. That may be the person that you are supposed to be with.