HH, return home if economics dictates that's what you have to do. Any chance of him moving out? You could try asking him, but would he take the house payments with him?
It might not be good for your serenity, but you could try for a formal separation while living in the same house. This would allow you to save the money you need to sell the house and divorce. Be very careful, and make sure you have a proper written agreement though because once you 2 are separated he's not likely to invest in the relationship in any way.
Take legal advice as soon as you can, then map yourself out a pathway.