There is no easy solution to this unfortunately.
I think as you have alluded to, you rub along well and he is a good dad, so the kids might not have picked up on this, particularly if you still share a bed.
They are at a very tricky age to deal with a split.
Financially, the current economic climate with high rents and high mortgage rates is not supportive of people wanting to split. Many couples will be staying together for financial reasons. Would you be able to maintain a similar lifestyle?
if you do split then you will have to get used to the concept of not seeing your children for a few days a week. Is this something that you would be comfortable with? What if he started a new relationship, how would you feel about that?
There are no certainties that splitting would
lead to guaranteed romantic happiness for you. You only have to see the threads on the horrors of dating to see that. It might though, so is it something you are prepared to gamble on?
There are lots of people in your boat and sexless marriages are more common than you might think. (Around 15-20% by all accounts) although they do define sexless as less than once a month which for some people is normal, not sexless!
I get that it’s awful for you though. It’s clear to me that you still have some romantic feelings for him but it sounds like he doesn’t for you. That is very hard to take. Nobody wants to face that their husband doesn’t fancy them anymore. Men don’t suggest open relationships when they still have feelings for you.
I have been in your position and felt so invisible and unwanted. I stayed and found happiness doing other things until the kids were adults when we eventually split up. I have to say though, it hasn’t been a bed of roses since then. Inevitably he moved on very quickly with a much younger woman (42 to his 55) and I have not found it easy. Stupidly, I still hoped things would get better, but they didn’t, they got worse and it shattered my self esteem. I am now single with a couple of shit short term relationships behind me whilst he is all loved up with his new partner. My kids things she is great too to rub salt in!
its a hard decision and it seems so unfair that the”innocent party” has to make it as he won’t:
Looking back, I would have taken a lover I think. It would have at least given me some comfort in a shitty situation.
Hope whatever you decide works out for you x