I don't really need any advice, just needing to vent 
My STBXH and I have been separated for 6 months. It's been a very amicable split but not without intense sadness and heartbreak. We have 2 dc, 10 and 12, and we have an excellent, cooperative co-parenting relationship. He still lives in the house we shared for 11 years.
He's gone away for the weekend with his new partner- a woman who he's been friends with for years. I 100% trust that there was nothing romantic between them until after our separation.
I thought I was fine with this, so agreed to feed his cats while they're away. I let myself in and there, right in the doorway of his bedroom (what was once also my bedroom) was a pair of her shoes. Well, I lost it. Sobbing, over a pair of shoes.
So what did I do then? You guessed it, I read his email. Of course it was full of "hi gorgeous" "hi beautiful" "love you" etc. Smart move , huh?? Don't know what I was thinking.
I have no desire to be with him again, and am seeing someone new myself. So WHY does evidence of his new life upset me so much? I don't want to be his "gorgeous" or his "beautiful" any more!! She's a good person and I truly wish them the best.
A bloody pair of shoes!! Aargh!!!! Does this sort of thing get any easier??