Girl's Behavior

Does being Snap best friends mean anything?

I am not that good with Snapchat so I thought I'd ask this here. Basically I have a crush on this girl I'm friends with and she kept insisting I create a Snapchat account, so I finally did and added her. Most of the time I have a yellow heart next to her name, but sometimes it's been a red heart and the two heart emoji. Does it mean anything that she Snaps me more than anyone else?
Does being Snap best friends mean anything?
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