Am I wrong

I just moved to a home where I have a lot of space and 2 roommates. I work an hour away from where I’m moving to at least until I can get transferred or find work closer…I had started talking to my ex and he mentioned he had to leave where he was staying by then end of the month. So I offered him to stay with me and help with renovations around the house and he wouldn’t have to pay any rent until he got in his feet. He got mixed signals or confused somewhere and thought we were back together….am I wrong for doing this. I honestly just thought we could help each other out…