I agree with nikki_caro. I heard a story once. That sounds a lot like yours. Two people, married, and living in a "marriage" but not happy. The man went into a counceler (a bishop actually, but quite the same) and told the bishop,
"i am going to divorce my wife, I am not in love with her anymore"
the bishop gave him this advice...
"if you feel as if you have "fallen out of love" with your wife... Then "fall back in love".
The man looked puzzled, so the bishop asked... "when you dated, what did you do for your wife?"
the man gave a list of things...
"brought her flowers, wrote her poems, spent time together..."
the bishop asked the man to go home, and do those things, sincerely for a month. Treat his wife just as he had when they were dating. Bring her flowers, drop the kids at grandma's, talk to her, listen to her..... And so forth. He told the man to come back in a month, and let him know how things were.
The man did as he was told. The next month, he came back and the bishop asked how he felt. The man told his bishop.
"i am so in love with my wife. I couldn't imagine not being with her."
the idea of the story is, you can fall in and out of love by choice... By your actions, and by you attitude.
When I was first married, I wondered if I had made the right choice... I sounded a lot like you sounded when you married your husband... Just thought it was alright...
Through serving my husband, and still dating, I am more in love with him that I ever was, and couldn't imagine marrying someone else.
Marriage is a precious thing...