Just one of those people and they always leave

I am one of those people
Those that don't know me don't know what to think
Those that have met me see a lie
Those that know me more know the true me

The third almost always leaves
Always gives up
Gives me the cold shoulder

I am one of those people
The kind that is a bit extreme
A bit temperamental
A bit bipolar
A bit out there

And I've yet to meet anyone who is willing to stay
I always scare them away.