Did he ghost me?

He’s studying abroad in Europe. His messages have been coming in just once a day. Last time I heard from him was yesterday saying “I went out partying.” Today I haven’t heard from him. We always check in with each other. He did all this before he told me “I was the girl for him. Wait for me and don’t date anyone else.” We are not official but he made it seem like he wanted to work on this.

What do I do if he messages me again? Any advice would be great
Did he ghost me?
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