Not necessarily. It means you had a meal together and it shared a date-like component. You wanna know if it's a date, define it. Do you think it's a date? Do you want it to be a date? Does he? Ask him. It's not really a date unless you define it as such. Also please don't give me "why lable it?" or any of that. If you give me that, if he gives you that, it's BS. If he says no, then it's a no. If he dodges it, then he sure thought so, but if you don't think it was then it wasn't, and you may wanna make the distinction for him.
It's not about who pays or even what you do, it's about how the two people feel about each other. If you're into each other, and you go out and do anything together, it's a date. Some people even consider watching a movie at home together a date. It's just about doing something together.
Odds are about 70-30 that its a date. He may just be setting ground rules for later dating (showing that he's being manly around your woman-itude); I would say that he's at least interested in being interested, if everything works out.
Here's a question to your question: does it matter if it was a date?