Why did he unfriend me on snap but still follows me on insta?

Me and this guy I’ve been speaking to for 4 months unfriended me on snap, as I did overreacted to him saying something. (I just started overthinking cause of past? He still follows me on Instagram tho and watches my stories! So why hasn’t he unfollowed me on that too?
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No he knows he still follows me! Like I texted him 2 weeks later giving him space saying “hey how’s you?” He replied fast with “good thanks you?” I replied 2 hours late “feels like I ain’t spoke to u in ages 😂.” And he’s just never opened that message on insta 😕
Why did he unfriend me on snap but still follows me on insta?
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