Guy I was talking to disappeared for a year and now he’s texting me again like nothing ever happened?

I meet at this guy two years ago when we were getting to know each other it didn’t really work out so eventually we stopped talking a few months later he text me to see how I was doing and we started talking again, the conversation was getting better but then he stop responding to my messages and now a year later he’s contacting me like nothing ever happened. He hasn’t explained why he disappeared for a year l I asked one of my guy friends for advice, but he said he might be contacting me for sex, but me and him do not live in the same state anymore
Guy I was talking to disappeared for a year and now he’s texting me again like nothing ever happened?
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