How do you leave a marriage without feeling guilty?

Yesterday I told my husband that I want to separate. It’s come up before but it never goes anywhere. We always end up trying to work things out. I’m at the point where I’m unhappy. I love him but I just don’t want to be with him anymore. I’m unhappy for many reasons. We have been together for 8 years & started dating when I was just 19. We have grown into very different people & don’t see eye to eye on a lot of things. We argue often. We have 2 kids together ages 6 & 3. I feel guilty for putting my kids through a separation should I go through with it. I also feel guilty for hurting my husband if I decide to leave. Marriage counseling is not an option, he refuses.

We have built this life together that I’m so scared to tear apart.