Cupcake, it took my H 6 months to come back... but it does not hurt if they see that you are not always at their beck and call...
How about going out at night 'with the girls'... and getting a baby sitter? And casually letting it slip in the conversation when you are with him...
Anyway, be careful. It does sound like he is showing more interest, so do not set artificial deadlines... just make sure progress continues... and let him know that you will not wait forever.
What I told my H was 'I understand that you have to set your 'stuff' right. Go and do it and when you are sure of what you want, come back. At that time, I will see where I am and whether I want to continue the R or not' It worked for me...
"You don't throw a whole life away just 'cause it's banged up a little"
Tom Smith in "Seabiscuit"