Is she just using me for free food?

I've been on 4 dates with this girl and she has never offered "pretend" to pay for a dinner. We haven't been to any expensive restaurants (most expensive bill was $60). We haven't really done anything sexual yet either. I asked her if she will have sex and she said no. All we have done was make-out at my place.
Is she just using me for free food?
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