only you can determine what makes you feel nervous; its natural sometimes to be with someone you care about and feel some anxiety. I don't think all nervousness is a bad thing.
Why are they sweaty? Is it a sexual thing?
Wow, third world problems an all. *roll eyes*
Well, that sounds a little awkward, but not like it horribly repulsed him. I think it would be okay to link arms next time, or just not hold hands. Your nervousness will probably dissipate if you stay together & this will no longer be such an issue.
help with what? Only you know why you are nervous, no one else.
That doesn't exactly sound like a crisis.
My point is that you are blowing the importance of that out of proportion. Maybe out of proportion anxiety is why your hands were sweaty in the first place. It might be good to try to keep things in a more realistic perspective.