My problem is that in the case of aquaintances or people I have just met, I am usually ready to bail out long before they are. I find that if I am required to be there, like on a break at work or something, then I can just hang out and the conversation will eventually end naturally.
The problem only arrises when I know I can leave, and I can see no reason for me to stick around.
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"I was made to love magic, all its wonder to know, but you all lost that magic many many years ago."
N Drake