I’m tired of games …

So I met a girl been dating for a while. I invited her to my hotel room after a great night out with my other friends. She spent the night with me the first night & the second night she made an excuse to be with me, I spent alot of money on our date night and I feel like something is keeping her from spending more intimate time with me & idk what to do. Of course I care about her and I don’t want her thinking it’s all about having sex but idk how to feel. She rejected me after a night with me after an awesome night out & I’m tired of spending so much money on this girl who I don’t even know if she will reach out to me. The last few dates I’ve been spending everything on her and she tells me she’s not ready for a relationship just yet but she told me she likes me. I like this girl and I wish things would work out but I don’t know how to approach this. I made it clear to her I’m interested in her but she told me she’s trying to see how everything goes. Idk how to approach this person. I feel really disappointed after she didn’t want to spend another night with me. How should I approach this?