Do guys have to pay for everything?

So I was always brought up with the impression to be a gentleman and pay for the lady, now is it just me or does this seem to be an old mentality? Woman now are defintely more independent so when i usually tell my friends that I took someone on a date and payed for her nails or payed for there shopping, they always ask why would i do that. My question is what kind of things are ideal to pay for if your dating someone or vs having a girlfriend? I've always felt ackward if the woman had to use her own money because it doesn't seem normal or I don't know how her finaical situations are, i know mine are okay if im offering to take her out?
Do guys have to pay for everything?
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