On one hand I want him to understand that even though he was going things with our son, my home is my home. He left it and he can't treat my house as if he belongs there anymore. I have to set some boundaries with him but I also don't want to alienate him or make him feel like I resent him helping our son with things.
Tricky situation.
I think you shouldn't worry about alienating him or his feelings, but figure out what would make you comfortable. If his being in the house when you aren't there makes you uncomfortable, then I think that would be good for you to set that boundary. If it doesn't bother you or make you uncomfortable, then don't set that boundary. OMG, I can't believe I'm giving you advice on boundaries b/c I am horrible with them myself!!! Karen