I want to spend time with my friends and not give that much attention to my gf
Why not give your gf attention?
I don't want to make an effort.
It's mean to ignore your gf. You should be giving her attention.
Why should I give her attention? It looks like she has it all already.
If you feel like ignoring your girlfriend, then I think your relationship might have some underlying problems on it. Perhaps you need to talk to her about this.