My house that I bought as an llc when we split up.Now we are back together but not getting along. Can I just tell him to leave? We live in Cols oh

Unlikely. Because you broke up and then got back together again (as opposed to just breaking up and then later getting around to a divorce) the court will likely consider the the LLC to be marital property, including the house that's in it. You can certainly ask him to leave, and he may, but you don't have a strong legal argument to force him out. If you wanted to do that, you would need to file for divorce and move for an order for him to vacate the property so that you have exclusive use of the property.