Strangers who tell their life stories to me...why?

i dont understand...at first i didnt want to socialize or talk to him as im not a social person myself...but then he just approached to me and chitchat and then down to his life stories and gave me advice (which he said didnt mean to patronize me)... this guy is a friend of a friend at work...

:( i just dont want to get to close to people in real life as abandonment hurts like hell already...but he seems nice, i thought he was an asshole jerk....but still i dont understand why he gave me life advice and stuff...
does this mean he want to help me so no one could experience or go thru the same shit he did before?

i have never wanted to let my guard down, but to make it fair i should do the same, right?