Based on my experience only, I have three things to share.
Enjoy your time with the man you love. If today is happy, be happy.
Continue to work your recovery and create, know, and exercise very strong and healthy emotional and concrete boundaries. Not as easy as it sounds IME. If you feel like this is could use some work, $$ for a counselor will be money well spent no matter what.
And this one might get me flamed but again, it is based on my experience only - do not have any more children.
If this doesn't work at some point in the future, near or far, the repercussions for the children are heartbreaking. I can't go back in time and change the reality my children live today. It isn't the end of the world for them but it isn't fair either. It hurts my heart every day and I feel like they have been cheated and I continue to have to make choices that seem to cheat them out of what they deserve.
We can't predict the future for your boyfriend. When my husband was in a similar place it didn't work long term so that is my frame of reference.