I read this thread with interest as the title resonates with me....I realize I am just not as into my husband as I would like to be. There's a whole thread up about it - 'I realize I don't want to be married any more'.
The big difference is that my children are now at college/University.
I think I probably married a man who I felt would be a great father and a very faithful husband - which I did - but put the sexual/romantic feelings and excitement lower down in the order of priorities.
Perhaps he did the same! In fact, I am sure he did!
When our children we quite small I had a few crushes and realized that I was not as 'in love' with my husband as I could have been and probably never would be, but I just could not bear to split up when we had young children, partly because my own father left when I was a child and I found it quite traumatic.
Anyway, we both threw ourselves into making a home and bringing up children and did the best we could. Sometimes we had a reasonable sex life (particularly when we went on holiday and got away from everyday stresses) other times it was verging on non-existent. I know there were times when my husband was frustrated but he too prioritized bringing up young children and having a family life as being more important than a sizzling sex life.
Fast forward to both our children leaving home to study and the old beast is rearing its head again. In all honesty, I am attracted to other men apart from my husband and am not sure I can stay married now that the child-rearing part is over.
We have had a few good discussions recently and my husband is well aware of how I feel. He too has his frustrations - they are somewhat different to mine but it is good that he has aired them as we both tend to be 'ostrich-like' and bury our heads in the sand. It may be that he has been as frustrated by the marriage as me, albeit in different ways!
I think there is always a dilemma with regard to the sometimes conflicting roles of making a home and bringing up a family and achieving a satisfying and mutually fulfilling romantic/sexual/emotional life.
I made a conscious decision to prioritize family life and home building over sexual fulfillment. And I think my husband did too. I'm not saying that is the right decision, but it was the decision we both took.
Others may think it is better to be completely sexually and romantically fulfilled and 'in love' and the children will be fine as long as the parents are happy, even if they are not together. And I am sure that can work very well too.
I haven't read your other thread so don't know the full picture, but, given the very young ages of your children and what you have said about your wife, I am wondering if you might find counselling helpful, maybe individually and together? I did this with my husband and it was really helpful for us both to be able to put forward our own feelings without being judged and with a third party moderating. It enabled us both to see each other's point of views. Anyway, seems like you are a caring, thoughtful person so I am hopeful that you will feventually find a way forward that works for both of you. Good luck!