Bestfriend money problems

So me and my best friend have been good friends since 6th grade and now we're bout to go to college together. We always had our ups and downs but no matter what we've been there for each other. we both come from pretty poor families so we always did our best when it came to saving and spending. which means we pay for each other if the other doesnt have. now that I have a decent paying job and she doesn't I feel like she constantly needs me to pay for her. which was fine at first cause she didn't have a a job and I really wanted her to come with me to go places. but right now I'm trying to save and recently when she asks me to go out with her and I told her I didn't have the money she kind of just was like oh damn. she doesn't get paid as much as I do but she does have money and it feels like I pay for her way more then she pays for my way. I'm not sure how to handle the situation or approach her about it. what should I do?