If your partner is a friend, then I'd say you are one lucky woman.
It is normal for marriage to have an ebb and flow of love -- just like the tides. Somedays there is more love, some days less and on certain days there is no love at all.
It takes two people to ruin a relationship.
If you feel something lacking in yours, then it is up to YOU (and hubby) to figure out what's wrong and fix it. That means opening up, being honest -- even when it hurts, and TALKING about it.
If you aren't sure what's lacking or if you don't know where to begin to start talking with hubby or if you stay confused, then I do think you need help.
I would suggest that you get some counseling.
If you aren't sure what to do, my rule is... don't do anything until you are sure.
And if you aren't in love with hubby anymore, don't you think you owe it to him to tell him and give your marriage a chance to work? (Of course, I am assuming you haven't talked to him about that -- hope I'm wrong).
A good relationship with WORTH fighting for and from the sound of it, you have a good one. And with some effort on both your parts you could even have a GREAT one.
It's all up to you guys. Q