Guys, why would he ask for my snapchat but not add me?

So last night, my crush asked what my snapchat was and since I was asleep I responded before school today. However, he still hasn't added me on snapchat, so why would he do that?
He won't add you
He'll add you, just be patient
Maybe he forget
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+1 y
It's already 7 pm and he hasn't added me yet
Guys, why would he ask for my snapchat but not add me?
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