Ignoring ? ( please help )

Ok so me and my ex have been friends for a couple days now just chatting right catching up, nothing flirty or anything on both ends, just when he asks me questions about our old relationship and everything he’s done wrong towards me, well me and him been talking all day long

For the past 4 days , until we wake up and fall asleep, well today he messages me in the morning and I respond, it’s been 4 hours sense I’ve snapped him and he hasn’t replied but been online on snap, even viewing my stories? Like wtf I don’t get it.. help?