Completely ignored me?

I’ve been hanging with this guy for 3 weeks. We hang out so much. There has been times where I’ve texted him and he never responds. But we always end up hanging out and being okay.

Today I called this dude to see if he wanted to get food after we got off work. He didn’t answer the first time so I called again, because sometimes he answers on the second ring. But he never answered. I texted him right after asking if he wanted to go get food...but nothing. About 30 mins after I texted, he posted a food pic on his snap, followed by him showing that he’s out.

I don’t know why he ignored me when he literally slept over 2 nights ago and was all over me. We went out with friends last night and he literally walked me to the bathroom and waited for me. Now I’m worried that he won’t want to hang out anymore?? Like how do you go from that to this? Also, I was freaking out that maybe he’s hanging with another girl, but he told me yesterday his friend was trying to hang and he called his friend today to see what he was doing tonight. So I’m probably just overthinking that part?? But why is he doing this?? Do I just wait for him to reach out to me?? Will he come back like he always does??