Can I cut off my rich friend without looking like I took advantage of her?

I have a friend with a bit of money who has spent a lot on me. Our friendship did end up becoming a brief relationship before she broke up with me. I've tried to stay her friend but it isn't the same as before. How can I peacefully end a friendship without looking like I was just her friend/boyfriend for money? Just ignoring her isn't possible because we have too many mutual friends who would reach out on her behalf. Should I try to pay her back somehow before I end it?
Can I cut off my rich friend without looking like I took advantage of her?
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