Is it fair that my girl besties buy their own lunch?

I am currently unemployed and studying to get a job. I'm on the pension and my money only stretches so far. I told them that I will supply the movies, drinks, snacks and dessert, I'll buy all of that myself, but we all have to buy our own lunch (pizza); or split the cost if we're sharing.

I'm just finishing paying off Christmas gift afterpay debt, so I don't think I can afford pizzas as well as everything else we're having amongst my TAFE trips, lunches, money for my parents and other occasions out with my other friends.

Is it fair that my girl besties buy their own lunch?
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