Yes! It absolutely requires sexual attraction for any romantic relationship to last or be strong.

And, yet, at the same time, sexual attraction alone cannot make a relationship succeed.

People have tried to proceed when one party didn't feel it for the other, it rarely, ends pleasantly, but does end.

This exact situation just happened to me... Initially I was really into this guy who seemed great on paper, but as I got to know him I started noticing aspects of his personality that were total turn-offs. I dated him about a month and realized that I had no interest in seeing him naked :D or even in making out with him! That was my gut telling me that he wasn't the one. Same thing for you. That's why you date - to see if you like the person enough to spend the rest of your life with them!! Listen to your gut and you'll never go wrong.

Cant agree more with Lindsey, DONT TRUST YOUR HEAD (its irrational even when it tries to be logical) you may feel like you want to see where it goes in the beginning, but TRUST your guts, the animal side of you. Because if you got with him, and soon after, you realize he wasnt what you wanted. That means he was never the guy for you.

Good luck.

Trust your intuition.

Mmm, I had this. Eventually, you have to make a decision. I let things run on for two months because I wanted to give the guy a chance. I felt grateful because he liked me and treated me well. But the end result was that I just hurt him. I should have ended things after a month of dating.
When something feels right, you know pretty soon....If it feels like hard work at the beginning then something's not quite right. The beginning is when you feel excited and happy and a bit scared...not just a bit blah, kind of indifferent, kind of unsure, anxious because you can't work out if you like them or not.

Ahh thanks for all the input everyone! It's been a huge help! :)