The Snail

I'm a snail, slowly making my mark everywhere I go
I'm a snail, curious about the outside world but anxious at the same time
I'm a snail, I have a shell that is hard for me but anyone can crush it
I'm a snail, I'm shy but when I get familiar with my surroundings I get a little more confident.
I'm a snail, that when I poke my  head out and somebody touches it it pops back in and doesn't show for a long time.
I'm a snail, trust is hard to get but once messed with me it is even harder.

It all started with do you remember