@Atla
I think you just have to rip the band-aid off and do it. Also, as
*@Pollypocket89* says you need to re-frame it in your head, he isn't your best friend, or perfect for you or any of that because if he was he wouldn't have had the affair.
I think when you have been with someone a long time you have all those threads of familiarity and connection built up over the years - activities you do together, shared jokes and humour, your friends and love for your children etc. It can be like a bereavement to lose that, but that's not to say you can't find a new way forward - alone, or eventually with a new partner.
If you both care for each other it should be easier to separate amicably and eventually build a friendship on different terms.
Hi op. I have been in a very similar position to you and I have to agree with this.
I found out my husband was having an affair. We had pretty much been together since we were 16, married for 13 years when it happened. He was my everything and I adored him.
I knew the second i found out though that my marriage was over. I would never be able to look at him again in the same way and not see her and what he did to our family.
He said he'd been unhappy but couldn't give a reason why and it was the first I knew. His 'unhappiness' seemed to coincide very well with starting an affair with a younger woman at work.
It's been almost 4 years now and I'm not sure I will ever be "over it". I meant every one of my marriage vows and a switch doesn't just click when you find out something like this that stops you loving them. You can love them and be angry with them all at the same time.
My marriage ending has had a profound impact on me and I feel guilt every day for our children BUT I couldn't let them grow up in a house full of resentment, where I became a shadow of myself and believed that was all I was worth. I worked hard to be amicable with their dad and they see a lot of both of us. Even together sometimes (birthdays, etc). He and I both have new partners (not the woman he had an affair with funnily enough) and I'm happy.
It's hard and if I could choose, I would have our family unit back without the affair having happened but it did happen and that's on him. I love my dp but I will never feel what I felt for my ex husband for anyone else. I know that. All relationships are different though and different can be good too.
Sorry if that was all about me, I was just trying to say I understand how you are feeling. You desperately want to cling on to what was but that has gone forever and if you both can't work with what is now then you need to walk away and try and co-parent your children the best way you can.