Terrified

I guess it's been a while since I last wrote anything here, but there's really been nothing to report.  I'm going through a lot of lonely times right now, and I can't seem to shake the feeling that everything sucks.  I've been doing a lot of thinking about who I am and what I want.  The tricky thing is, what I want isn't always what I need, and I have a history of making bad decisions.
I live just a short walk from my work, and sometimes I see interesting little happenings on the way home.  One night, I passed by a young couple, probably in their early twenties.  He was carrying a small suitcase, and she was begging him not to go to wherever he was going.  It was dark, but I imagine there were probably tears in her eyes.  At one point I heard her say something like 'I'm terrified something bad's going to happen to you, and you'll get killed.'  A part of me wanted to step in and help them, but that sort of thing would be intrusive, so I kept walking.  I don't know what happened to that couple, but I kind of wish I did.
The point is, that small moment made me realize something that I want in a partner.  I want to have someone who would care about me enough to stop me from walking out the door.  Someone who could be a voice of reason when I'm unreasonable.
I know that's something I need, but right now, I just don't know where she is, and it makes me feel completely lost.