Am I wrong for telling him I want to pay for mines but I don’t have it right now so I prefer to stay back and you go get one?

So I am in nursing school so my working is off so I don’t have much money. I have been trying to get things together. In the mean time my boyfriend has paid for a lot the whole time we have been together. Just about two months ago I started doing a lot and more for him now. Every time he gets upset with me though he has thrown in my face multiple times about what he do for me. Today was the last straw. He asked me if I wanted to go to a massage place but I’m not trying to spend money on things right now that aren’t important.
Am I wrong for telling him I want to pay for mines but I don’t have it right now so I prefer to stay back and you go get one?
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