I feel like I want to flirt with a girl while in a relationship.
Why do you want to flirt with another girl?
I don't want to lose hope because of her.
It's terrible to be disloyal to your girlfriend. You should always have the strength to avoid temptations of doing the wrong thing.
Fuck you, and I thought this was supposed to be a fun thing.
I don't think cheating on someone should ever be viewed as fun. You ought to consider your girlfriend's feelings here.