Should I block him?

Me

I met this guy a couple weeks ago and he basically told me that he was interested and wanted a relationship. He would ask me if I wanted to hang out and anytime I agreed he “fell asleep” or had to “work late”. I sent him a message on snap 3 days ago that he hasn’t opened. I know he’s not busy as he’s been posting stories. Do I just unfriend him or block him? Or should I message him again and see if I receive a response?