I'm going to smoke weed behind my girlfriends back
Why are you hiding that from your girl?
I'm ruining my own life, I thought it would make me less retarded.
I think that you should be honest with her. It's just weed, it's not like you are doing hardcore drugs.
It wouldn't matter because she is going to flip out. I'm just going to enjoy it while I can.
If your girlfriend doesn't want you to smoke, you should talk to her. Maybe you explain your situation and convince her.