A shoulder to lean on...I guess?

It has come to my attention that I seem to be an avenue, if you will, for certain girls to tell me life-altering details about their lives when they hardly really know me. How do they know I'm not going to tell everyone I come across about their dirty little secrets and shameful past? The thing is, I won't, and wouldn't do that to someone. Unless they did something that really pissed me off, then they're screwed :) Haha. But really though, last night is a perfect example and sadly, not the only one.
My boyfriend and I had a laid-back night with friends; had some drinks and played pool. His friend's girl and I immediately start talking-we're women, it's only natural. Well as soon as she's a little buzzed her whole life story comes tumbling out of her mouth, a story about drugs, missing parents, and painful diseases, and here I am, in my nice suburban home, with my wonderful father sound asleep upstairs, so someone tell me what I am supposed to say here! I just went on about how she's "so strong" and "turned out pretty good for a girl in her position", all of which I totally meant. But it was hella awkward so along with the words of encouragement I made sure to continue downing the parrot bay-maybe trying to feel a little less awkward.
I feel for this girl, & she seems like a good person, but this crap has happened to me before and frankly-you just can't trust anyone these days. And the sad thing is, you want to automatically because it's nice to think you can trust someone and count on them, especially after they have told you some really personal stuff.
But what I really want to know is: am I a beacon, or do I send out this vibe, if you will, that lets people know they can tell me brutal truths about their past and every numbered detail of what went wrong in their young lives? Or is it the booze talking?

Not sure if this is a good thing-
A