Moving in with ex boyfriend, yes or no? Please read and comment what you think!

Okay so my ex partner and I have been broken up for 7 months now, we do also have a 1 yo little boy, I moved 150km to be with someone, which didn't work now I have to move all my stuff back to my home town, also I don't have a house of my own anymore as I have it up when I moved, so currently I'm living with a friend. My ex partner was saying how we should move in together as his living arrangements are also messed up, my son really doesn't see much of him and I'd love for us to live together and him be there for our little boy, we've already told eachother that nothing is going to be happening.. I just don't know do you guys think it's weird?