I’ll start this list with the fairly obvious. If she takes longer than, oh, a nano-second to respond she’s not into you. Ok, give it some more time but just being truthful here; if you’ve gone to bed and awakened the next day and still haven’t heard from her, she’s not into you.
This could be email, text, whatever form of communication you have with this girl. It’s a harsh thing to accept. Trust me, I know. I’ve been on the receiving end of… well, when they don’t ever respond, it’s not really the receiving end of anything, is it? Girls are a lot better at the whole “communication” thing, it’s just in their DNA. So when they deliberately delay talking to you, you can be sure they know exactly what they’re doing. In not sending a message, they’re sending a message. And the message is: “Get lost, creep.”
Check back in tomorrow for another sign she thinks you’re the worst thing since non-microwavable plates.