What is hard to find but easy to lose, worth more than gold but costs less than a penny?

Question

I am a feeling that cannot be touched,
But I'm more valuable than gold or clutch.

I'm a force that's strong, yet soft as a dove,
And I'm the reason behind every love.

You can't see me, but you feel me so true,
I'm what makes me say "I love you".

What am I?

Answer 1

A friend is the answer