Am i getting used by gf?

[Carla]

I don't think she's using you at all. She's offered many times to pay for things and youve insisted that you would and when she offered to pay for dinner you insisted you went somewhere cheap. Thats because youre a gentleman and care about your girlfriend, but if you didnt insist on those things she would of probably paid. And alot of girls wouldnt even offer to pay aswell. She seems nice and when you went and got the pizza she chose to have your pizza because you made the effort to get the pizza and in my eyes i think if she ate the sandwich and not the pizza she would of felt rude because you made the effort to get it. And who would choose a sandwich over pizza?! she's definately not using you, seems polite enough to me ad decent by introducing you to her family