Advise with husbands relapse

i’ve been with my husband for nearly ten years and we have three incredible children together. When our first child was 8 months old i discovered he had a gambling problem we had nothing and we couldn’t even afford milk for my son i also found that his parents had been guarantors on loans and had never told me that there a history of a gambling problem. 

All my friends and family told me to leave but i couldn’t this was an illness and i loved him we entered into settlement plans and paid everything off and have gone on to get married and have two more children and have celebrated every year that were another year free from gambling

The last two years though my marriage has changed with him being distant and i’ve asked so many times was this happening again and been reassured no my parents have also asked as we would have supported him fully. 

On saturday i noticed a lot of letters arrived all defaults and late payments i opened them and asked for an explanation and even then was told it was historic and he would deal with it when he got home but the more letters i opened i soon realised how big this was only then did he admit it. We’re talking over £40K of debt and i’ve said i won’t do this again he’s saying he can’t do it without me and the kids and he has nothing i’ve asked him to leave but he has no where to go and no money to rent or stay anywhere. 

My son who is 8 keeps asking why i’ve asked his daddy to leave they all adore him and he’s an amazing dad but i don’t think i can do this again and live a life of managing all money and entering into settlement plans again. i want a future for my kids where we have our own home and are able to enjoy things like holidays and i can’t have that with my husband but i also don’t want to break up the family. I work so hard and have a good job and we should be financially comfortable but his gambling has made sure this isn’t the case. 

if he had spoken to me i think we could have tried to get through this but i worry he’s not hit rock bottom and is ready to change as he still lied to me on saturday saying it was historic im so torn with what to do there’s no trust and to my friends and family it’s a simple walk away but it’s the kids they still need their dad there still so young but i don’t think i can do this again and live with the fear of what if it happened again. 

has anyone been in a similar situation that can offer me please some advise/guidance as currently i’m broken and have no idea where to turn next whilst trying to give my kids the christmas they deserve with a smile on my face.