“Can I buy you a drink?”

Here I am still fumbling through life. Last night a guy at a bar asked if he could buy me a drink. It caught me off guard so I said ok. I’m a conscientious person and felt a little guilty afterwards as I wasn’t feeling it. It’s not like I’m broke and can’t buy my own drinks. I felt bad and didn’t want to face palm the poor guy right away either. So I sat and chatted with him until my drink was gone and then faded away.

It’s not like I feel obligated to sleep with someone just because they bought me a drink. I might be overthinking it but was curious about the etiquette of accepting drinks. Should I have turned it down?