Why is he “ghosting” me?

I was snapping a guy for almost two weeks, we got along really well talked about a variety of things not just “hey” and “what’s up.” I talked with him about things I never told anyone, and he was the same. We agreed to meet up, he lives 45 minutes away. He said he was meeting a friend in the area the next day so he didn’t mind the drive to come see me. (I’m a freshman in college) he’s 20 and has a daughter. When we met it was really good, we had great chemistry, talked about life. It was just an amazing feeling I got with him. I told myself I wouldn’t have sex with him, but when I was with him it just happened I really wanted to. (I probably shouldn’t have) When he left to see his friend he kissed me on the cheek and said “text me when you wake up” and said “next time would you wanna come to my place?” So when I woke up I texted him saying I had fun blah blah, he said the same seeming super excited. I asked how his visit to his friend was- no response. We usually talked all day. He did snap me in the morning, but it seemed like snaps he sent to everyone. We snapped back and forth a few times, then he didn’t open my Snapchat for about 8 hours, he eventually did and left me on open. I was confused and decided to text him, as I’m not someone who plays games. I said “i noticed we haven’t been talking as much, if you want to be honest and up front with me you can, I don’t wanna waste my time” he read the message and didn’t respond. It’s been more than 12 hours. I know he’s been on Snapchat and his phone. What does this mean?
Why is he “ghosting” me?
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