I've long suspected my h of having had some kind of affair, emotional or otherwise and had even posted here about it but asked for it to be deleted when I was berated for not making him feel wanted enough 
Anyway, I appear to have had some kind of Epiphany overnight and realised that I just don't need to prove it. I know its happened, as does he and that's enough. I just don't care anymore.
It has taken me over a year to feel like this! I can end things just because I'm unhappy. I don't need to be hurt more to 'prove it'.