Can I tell my gf I cheated on her?
It is bad to cheat on your girlfriend. But being honest is the best way to go about it.
I don't think this relationship is going anywhere.
Break up with her instead of cheating on her. Cheating causes a lot of pain.
Cheating is not about hurting other people. I do what I want and she doesn't care, it's fine.
Just break up with her instead of cheating. That way, both of you can do what you want and nobody will get hurt.