Stay focused on yourself.
Focus on what you need to have a healthy baby...even if this means that you consciously take him out of your thoughts to your best ability so be it.
You love him. That will not change. You know yourself and you know how YOU feel.
Release the idea of control over the situation because it is HE who is not in control of himself and you cannot control where he is in his thoughts. You can control you or at least carry yourself to where you need to be.
Meditate. If you don't meditate listen to some that are online and center yourself.
You are the sole keeper of this baby regardless of what happens between you are your husband. You are the mom and you need to stay healthy and happy when you can. Stay centered even with the world of hurt and choas around you. Try to be happy in your own space and surround yourself with people and things you love.
When I was pregnant (twice) my husband was having an affair.
You are the calm and the refuge for your child and keep telling yourself this.
Growth is often painful, and we never know these things happen to us while we are in them...and these experiences can be so painful. I truly feel for you
Teach your baby how strong it's mother is.
Teach your baby the same strength while you are still pregnant with your baby.
Your baby is blessed you have you as it's mother.
Will he go to marriage counseling? He needs to find a way to recommit himself to his relationship with you and deal with whatever he'd dealing with (or running away from).