He added me on snapchat, what does that mean?

Anonymous
A guy I've had like no contact with for over 5 months recently added me on snapchat. I had a crush on him in the past and I'm pretty sure he knew since he told me he liked another girl. I did get the feeling though that he was attracted to me based on the way he look at me. Also when he rejected me he said that he had this thing with another girl and didn't want to complicate things. We hadn't really seen each other since then except for one night a few months ago we crossed paths at a party but we didn't even talk to each other. He kind of just looked at me across the room and I looked back but nothing else. Then occasionally I'd see him dancing with other girls but at that point I was with another guy I had been dating at the time. It's totally random that he'd add me considering we aren't friends and there'd be no reason for him to even send me a picture. I always thought I annoyed him. Granted I still find him attractive but, after getting rejected once by him I don't really have the confidence to make any real moves without actual affirmation that he's interested or encouragement on his part. I know for a fact though that he's single.

Should I send him a snapchat? What should I do?
He added me on snapchat, what does that mean?
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