Should I add him on Snapchat?

My crush once asked me for my Snapchat, but I didn't use Snapchat back then, and now he has gone back to his country and I want to keep in touch with him. And now I am using Snapchat, Is it weird or creepy to add him via phone number? I got his phone number from WhatsApp group. Or what if I post an Instagram story of my Snapchat, so maybe he will add me?
Should I add him on Snapchat?
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