My husband and I were married almost 10 years and had 3 kids. We got along well, but we were very different people. As the years went by, the differences between us became more and more apparent until they were massive canyons between us. He is a homebody, I love to travel. He is introverted and doesn't maintain friendships. I do like quiet time, but I love being with other people. He likes a narrow selection of food and watching tv, I like exercise and lots of different types of foods. He is cold and physically unaffectionate. I am tactile and love being close to others. The list goes on and on. In the beginning a lot of this wasn't apparent. We were in careers working long hours, we both travelled a lot for work. Once that stopped and we changed jobs, and the years went by, I realised how different we were.
I still remember the exact moment when I knew it was over. We were on holiday in France (it took 2 years to get him to agree to go) and I was watching him with the kids in the park and I just realised that my whole inside was hollow and I was so utterly lonely, and that we had made a huge mistake in getting married. We were great friends, but we wanted massively different things out of life.
After that I went through months and months of turmoil, torturing myself for wanting to leave and thinking I couldn't because of the kids.
But in the end, 8 months later I asked him to move out because I was so irritable and miserabe with the kids because I hated my relationship with him.
He did, and I felt total and utter relief as soon as the door closed behind him.
We have managed to remain on good terms and we are still married, planning to divorce after the two year separation point.
What I will say is this:
My husband has gone out and got his shit together. He's got back in touch with his friends, changed jobs and is even losing a bit of weight. He denies it, but I tell him he was miserable with me.
And I am so happy for him. We were not right together and we can now coparent in a way that works for both of us.
We were lucky, in that we've come through it (and don't get me wrong, there was yelling tears and rage), but I just knew if we stayed together I was going to die years before I needed to because of how unhappy I was.
I wish you lots of strength and luck, whatever you decide to do.