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They leave you hanging

If you find yourself waiting around for hours — or days — for a text back from this person, it's a big sign that they're just not interested.

"Everyone is busy, but we make time for what's important. Not responding timely or at all is usually a sign of disinterest," Perry said.

Of course you can't blame someone if they go MIA if they're going through something, but if getting them to talk to you feels like constantly pulling teeth, it's probably not worth it.

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