Okay, so I recently broke up with my boyfriend of a year. Before that, he was my best friend for three years, until the start of this year when he decided he couldn't handle unrequited love and forced an end to the friendship... We held out for all of two weeks and decided to try friendship again. Mutual friends who'd seen us together kept trying to convince me that we were more than friends anyway, so what would it hurt to try a relationship? I kept telling them that I wasn't physically attracted to him like that... He is more like a brother, or a voice in my head. It is so hard to explain the connection we have - almost like extensions of each other. However, I feel no passion towards him, I do not enjoy sex with him, and Lord knows I've tried to find chemistry between us. He feels completely different, but I am his first and only, therefore he has nothing to compare it to (and he is a guy).
I simply do not know what to do. He is the most intelligent man I know, and the guys I've been hanging out with/met since breaking up with him are ridiculously average: they cannot even follow my conversation, let alone reply in kind; though feeling attracted to them at first, I lose all attraction towards them if they have not the intelligence to converse with me. I feel like I made a huge mistake, because I've lost the voice in my head (har-har), and yet I know that this will repeat itself if I try and return to him. He knows this too, and he said it was worth it to be with me (yes, he is a true romantic, ad nauseum). I simply don't know how to deal with the loss of him as a person, and yet I can't stay with him as is. What do I do?

Following your feelings and your gut and using your head is never wrong. Sounds like you have it right and did the right things. Just follow your heart and head and you will do fine and your friends will have to accept that. Good Luck.