Should I add a girl I like on snapchat from quick add?

Hi everyone. So me and this girl and another guy went to extra maths classes together last year and i started to kinda like her. I met her a few times on nights out and we talked for like a few mins each time I met her. Anyways she came up in my snapchat quick add and I was wondering if it would be weird if I added her on snapchat? And if I do add her how long should I wait to text her? And what do I say?
Should I add a girl I like on snapchat from quick add?
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