Originally Posted by
joypulv
Your conflict is evident! You say in once sentence that your marriage is too mundane and in another that you 'live him as I be known him for over 15 years,' which I think means you love him just for the comfort of time.
I would end the affair. No reason to jump from the frying pan into the fire. Get about 10 sessions of good talk therapy. Resentment over money spent - can you get past it or not? Lack of sex life - can you two talk it out, find the reasons? You don't even mention talking to HIM about reasons. Comfort of 15 years? For some it's worth staying, and for others not. What happens when life is too mundane with the next man?