I guess, for me....you simply shouldn't have to try that hard if you love your H.
I can't tell how many times things you have said have reverberated through my brain...things like "I didn't love him to begin with". Chrissy, I think you need to figure out a few things and it's not going to be easy.
#1 How do you feel about your H, really?
#2 What do you think he would need to do for you to feel the way you want to about him?
If you don't love the man and never did (assuming that's truly the case)...I don't think you can force yourself to have feelings that simply aren't there.
Trying to force yourself to have feelings reminds me of a situation I was in oh about 5 years or so ago. A very dear, close friend of mine, who is a really great guy wanted so badly to have more than a friendship relationship with me. So I tried, but there was simply nothing more there than friendship for me. He'd have been a great catch as far as husband-material goes, made a great living, would have treated me like a queen, wanted a family and would have been a great dad....but the feelings simply weren't there on my end. I've known some people in my life who would have married him in a split-second and never given "feelings" a thought...but I did. I knew if I married him and didn't love him...I'd be unhappy in the long-run.
So I'm going to ask you a very blunt (yes, you know me ) question.....have you ever been really happy with your H? If so, what made the situation a happy one at that time? Were your feelings better towards him then?
I think (IMPO) what you really need to do is figure out what YOU want.