I think I am going to lie about meeting up with a female friend
Why would you hide that from your girlfriend?
I just want to spend time with one of my best friends. I don't really care about my girlfriends opinion about it.
You should be honest to your gf about what you're doing. She might be really upset if you hang out with this other girl.
I don't want to listen to my girlfriend talk about feelings and crap.
What if your girlfriend finds out? Because you lied, she is going feel she can't trust you. The sad part would be that you were just for hanging out with a friend. When you love someone, you have to sometimes "talk about feelings and crap."