You made the choice to pay for those things and you aren’t entitled to get it back, so there’s no “she owes me” (unless of course it was explicitly agreed she would pay you back, then it’s more than a money issue: she doesn’t respect you).
I was in a similar relationship where I consciously paid for things, including things that was agreed to be paid back, it never was. The same energy and generosity was never reciprocated. If this sounds like your relationship you will only end up further disappointed and you’ll be happier in the long run if you end it.
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