We have 2 kids (at school, under 10yo), busy lives/jobs and have been together for 15 years. We do little together which is not child related (including sex). He is grumpy and often difficult with me but an excellent father. He has never wanted to marry. I come from pretty dysfunctional but overall happy family (lots of divorces/deaths) but have always thought I would rather live in a loveless relationship rather than split. This is a belief I have held strong to my whole life (although my own childhood was fairly happy despite ructions). Family life is lovely but as a couple we are stale and have no fun or sympathy with each other.
THEN...I met a man who I felt in love with at first sight.
I have talked to both this person and my partner about my feelings. My partner realised we should work harder on our relationship, but 2 months in life is just the same as ever. I am good friends with the other guy. We accept nothing can happen in the present situation and he is loathe to break up a family, as am I. However this experience has shown me just how bad my current relationship is and how loveless my life. My partner has slipped happily back into our current loveless state with minimal acknowledgement of our situation. But I just don't think I can. I like him less and less. I stay at work late to avoid him. I breathe a sigh of relief when he's away and I have the kids to myself.
Any advice? I think we could be very good co-parents together but can and should I try and save this relationship?