Leaving my partner

I found out 3 yrs ago my ex partner had a problem with gambling, tho he denied he had a problem then believing he would give it up and wouldn't gamble anymore I put trust into him. 1 year later I found out he was still gambling see betting transactions on bank and betting slips hidden in pockets. I confronted him and he admitted he has a problem but it's not that bad he can stop he said. I suggested him going to GA meetings which he went to 1 and said it wasn't for him he's not like them people there. Once again I trusted he could stop foolish of me I know but I loved and trusted what he said to me. Fast forward to now about a month ago I found he was gambling still but this time taking out loans not paying his bills and never having any money to help with household costs, even tho he works and gets a good salary. This time I'd had enough the lies the manipulation when ever I brought up the gambling in the last 3 years he always made me feel bad for mentioning it. Saying stuff like I'm proud of myself for not gambling how can't you not be proud of me, when knowing he was putting bets on all that time. Ive been with him over 15 years and I've had to finally think of myself and walk away as hard as it is.