Am I a gay prostitute in your opinion

I had a date with an older man “I’m into older guys” that I met online. We met for dinner and he wasn’t for me , not just that he used a very old picture in his dating profile but out personalities were different . I thanked him and left as soon as we finished dinner and on my way home he called and said he could tell I wasn’t into him but if I would meet him at a motel he would pay me $500. We met , we fucked and I got paid. That was over a year ago and I’ve been seeing him every week,’plus one of his friends who pays me the same. It’s only two guys so does it make me a prostitutie?