I'm unsure and undecided

I've been with my fiancé for over 14yrs, engaged for about 8yrs, we met in college. We both joined my parents company and for years everything was great, until the business and my parents own relationship started to take a turn for the worse. About 4yrs ago my parents started their divorce, the business suffered and my fiancé and me were left to pick up the pieces. It was impossible and in the end we had to let it close causing my father to become bankrupt. He's blamed me ever since for this, so now I no longer speak with him. My mother moved to another county with my sister and all the while I suffered from panic attacks and sleep deprivation. My fiancé was by my side through thick and thin. I'm finally getting better and also found out I have a B12 deficiency issue which also had been affecting my moods. But now as I'm starting to find me again, I'm starting to wonder if I really love my partner, Don't get me wrong he's a great guy and I love him to pieces, but over the years he really let himself go - he's become x4 bigger than when I met him. When I look at him I don't feel attracted to him, I never want sex with him and it just feels like we're best friends rather than lovers. Now this isn't for a want of trying on his part, but he's not exactly romantic and just can't seem to get it right even with my guidance. I know I probably sound cruel but I really couldn't even imagine hurting him, it tears me up inside to think of telling him I want to end it, but I also don't want to hold out to see if I change incase that hurts him too. What do I do? Who should I talk to?? Argh this total lack of decisiveness is killing me, I just don't want to make the wrong choice and regret it for the rest of my life.

you feel like he is your best friend that says it all,try talking to him maybe he feels the same way,its best to communicate here

I have and it didn't go too well at the time for obvious reasons, he even accused me of cheating on him which I haven't. All I tried to get across to him is that I just didn't feel the passion anymore. We talked it over constantly for weeks and I was honest, but now he seems to think its all ok just because he's started holding my hand and giving me hugs. We even tried couples of counselling... He still loves me and finds me attractive, the problem is me. Am I just confused at the moment and time will make it better, or have I reached the end?