Dont feel sorry for him! Feel sorry for me. I'm the eejit who still loves him despite the position he's got us in. I'm just trying to do some damage limitation if at all possible, but I certainly won't be rushing down the aisle anytime soon!
You should ask your OH what was used as collateral for the loan....it may be the house was used for collateral.Joint tenancy means you both own the house together so I don`t know if the bank would be able to accept the house as collateral without your permission.....are you sure you didn`t sign anything?You should see a solicitor....he could write to the bank clarifying if the house is in "play".
I wouldn`t get married ..yet if I were you....there might be some legal issue with it.
I also think your OH by himself, even just for his interest in the house , can`t use a joint property as collateral ....consult a solicitor about that.