Why did Frodo Volunteer to take the Ring?

[Orual]

What I find curious about Frodo volunteering himself for the Quest to destroy the Ring is this, he couldn't destroy the Ring.

No stranger than Elrond letting Boromir go along! A quote from a parody:

Boromir: I'll just invite myself along, for no good reason. Certainly not because I have larceny on my mind. Nope.

Is it just me, or was it fairly obvious that he wanted the Ring? Or at least that he didn't think that destroying it was the best option? But I am getting rather off-topic.

I think that Frodo took the Ring, as has been said, because something in him said "This is your quest, this is your future. You're the only one who can do this, so do it. Now!" Which resulted in "I will take it!" (A scene that always touches me.) Perhaps it was also because he didn't want to part with the Ring, but I tend to think (or want to think) that his motives were purer than that.

~*~Orual~*~