How long do i wait?

So Thursday night my boyfriend said he needed space for a couple days to concentrate on what needs to be done for his business. Friday he asked me to hangout so I did for a couple hours he didn't want me to leave but I had to beciase I worked the next day, Wednesday we had made plans to see each other Monday night and for me to stay the night but he hasn't messaged me since Friday night and idk if Monday is still on. What do I do