Autumn
Hi lostmind,
I notice you saying that in this relationship your mind doesn't work right, well that is a big clue right there that things are not so clear or so secure for you. Whether he is seeing other women or not we don't know, but if his living situation has changed to now include his ex well that is a big signal too.
Sure, he can care for you and miss you and enjoy your company. But I believe the first priority in this picture is that child and what he needs. If he needs his dad at home, he should have his dad at home especially if dad is available and wants to be at home with his own child.
Now I am wishing for you a man who wants to have a child with YOU and stay right in the home and make a family! :)
Take good care,
A