WHAT DOES IT MEAN WHEN A GUY SAYS SUP?

So I am starting a streak with this guy that i’ve been talking to (i’m pretty sure he likes me) so I sent him a snapchat saying “text me ;)” but i’m pretty sure he thought it was streaks but then after a couple hours or so I sent streaks again saying streaks then he texted me. He sent a photo saying “sup” and we had a short conversation because he was about to play fortnite lmao but saying sup is he friend zoning me? I mean he texted me after I sent streaks knowing when i sent him “text me”, it was just to him. Also he said sup when he was about to play fortnite so he didn’t have to bother saying that but he did. I am so confused with this guy help!
WHAT DOES IT MEAN WHEN A GUY SAYS SUP?
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