Leaving good marriages

I have a very good husband. Really, a great husband. All those articles (and posts here!) about men not pulling their weight — he’s the opposite. He’s caring, he’s loving, he’s supportive, he’s attractive. He does all the cooking, cleaning, grocery shopping. He shows up. We have fun together. We’ve been married 10 years, and I love him.

We have issues, like anyone. Mainly our sex is a little boring for my taste; I carry some big resentments that we talk through (in counseling together) and are still working on. The passion feels fizzled. We got married, in my opinion, too young (25 — we met in high school) — he did some things when we were very young (pre-marriage) that today-me would not forgive. But all in all, a good marriage.

And yet — I want to leave it.

I feel it’s run its course. I love him, but I don’t feel in love. (no kids in this equation)

I’m CERTAIN I won’t find “better” than him (I have single girlfriends; I know what’s out there). I fear leaving will be the biggest mistake of my life. I know staying for that reason alone isn’t fair to either of us (especially him).

Has anyone faced something similar and lived to see the other side? Was leaving the worst mistake you’ve ever made?