Stupid fights for nothing

I start stupid fights over the most trivial of things and I don't know why. She's not the kind of girl who will tolerate it and I don't want to lose her for something stupid like this. What can I do to stop? It's like I feel slighted with things and need to fight to win or something

Sounds like you feel inferior & insecure in the relationship. Do you feel like she's out of your league? Starting stupid arguments is a great way to drive someone away. It's childish behaviour and no grown-up wants to date a child. There's also the social element, it's embarrassing for your girlfriend if you do this in front of other people.