I'm going to leave my friends to hang out with my girlfriend
Why would you leave your friends?
I love having fun with my girlfriend, I don't care about my other friends.
You are obligated to finish spending time with your friends before you spend time with anyone else. They wanted to hang out with you so the least you can do is stick with them for the time being.
I want to meet my girlfriend but you are making me stay here.
You made a commitment to hang out with your friends. You should follow through instead of ditching them.