<human>: Not sure how much my BPD disorder plays into effect.
But I am obessed with someone I once dated and loved when I was 16.
Obsessed that I haven't felt deeply for anyone since then.
She's gone, and isn't even in my life anymore, but I still stay somewhat devoted.

The feeling is more than just a simple "move on, not everyone is the same"
That's the thing, I know no one is the same. Something about this girl was so damned unique that my head and emotions are attached.

I've given girls chances; I given relationships chances; but i just feel so unhappy. I really don't know to deal with these things.

Can you condense the text into a few key points?
<bot>: I am struggling with pure obsession/devotion to an ex, and I don't know how to really get rid/ or deal with my issues.