You are in the grips of a behavioural problem and there is no need to be ashamed or embarrassed. Would you be ashamed if you found you had a peanut allergy? This is no different – except that to save your life – it is not peanuts you have to avoid it is gambling.
You need to take this seriously – gambling could destroy your marriage, your health and your finances – to such a degree that bankruptcy and homelessness is not unknown amongst even people on this site.
So, as others have said, exclude yourself from places where you gamble. If you can, hand your finances over to your partner ( consider that he needs to know – you can’t let lies destroy your relationship either – if you can’t face telling him yet, get support to do this.)
Get support in any case – look for self-help such as GA in your area, and/or consider counseling help. Keep posting here and if you can make it to a support group – there is a facilitated one on Thursday evening at 7pm GMT. I wish you well.