I'm going to tell a girl that I wasn't looking for a relationship
Did you ask her if she wanted a relationship or not?
She said I was stupid because I ask questions like this.
It may have hurt her a lot, but you are good for being honest about it up front. You two might be incompatible so it's best to quit now before you have a lot of issues down the road.
We've been going back and forth for months.
I think it shows a lot of maturity to want to discuss relationship intentions. If she doesn't appreciate the conversation now, she likely will later because it cleared the air of confusion.