DID I JUST GET GHOSTED, AND IF SO WHY, AND WILL HE COME BACK AROUND?

I have been casually seeing this guy the past month. We hang out a lot in a group with his friends, and also one on one some. It has been great. No drama, and we have a lot in common. We are both fans of the same college team, and enjoy the same things. We have been intimate, but not every time we hang out. Friday he asked me to go to a concert with him. We go to the show with a few of his friends, and have a blast. The entire night he is holding my hand, or putting his hand on my back, kissing me. He even was telling me I'm like the perfect girl for him. We have a great night, and then go back to his house. I stay the night, and wake up the next morning to him being really sweet, and cuddling me. He was begging me to just stay and cuddle the rest of the morning. He even jokingly hid my phone so I would stay longer. I had to get home, so left. He walked me downstairs, and kissed me goodbye, and said he would text later. Around 1:00pm he sent me a Facebook invite to his Super Bowl Party this Sunday. As the day and night went on I never heard from him which was weird. Around 10pm I text him and asked what he was up to. He ignored me entirely which he has never done, and I have not heard a word from him sense. He has essentially ghosted me for no reason. I know he is ok because he keeps commenting on the Super Bowl invite that he invited me to. What could have possibly happened? What should I do? I still have not said another word to him. I really liked him. Help!