Why is my 'one night stand' still texting me?

I went to high school with this guy. He always made attempts to hang out with me since highschool. I usually would blow him off because I was not interested. One time he worked at a store I went to and asked me to come to one of his baseball games lol again, blew it off thinking he just wanted to get in my pants. He then would write me messages multiple times via social media to hang out. I was just too focused on work and school and was not interested in hooking up. This time last year i agreed to finally hang out with him. We had quite a bit to drink and then we hooked up. The sex wasn't what i hoped for because he didn't last long lol but it's not a big deal to me. 6 mos had went by & we never said a word to each other. Until one day he randomly liked a pic i posted. I didn't think nothing of it until after a couple months, a message was to follow to hang out again! This was back in November! His messages have went from "wanna hang out" to "i wanna see you" or "when can I see you". He told me he misses me and been thinking about me in a "certain" way. He texted me a few weeks ago saying he wanted to see me. I told him lets meet up then he said he wanted to "fu** me so bad it was unreal". The thing that gets me is he usually don't respond to my messages if I tell him I can't hang that night or won't even open to read them. Our last convo I told him I was unable to leave and right after that he posted a status that said he was sick of everyone's mind games and they needed to make up their minds. Then posted another status about how he was beyond ready to settle down with someone. I thought it was ironic especially because he had just previously tried to make an attempt to hang with me mins before. I can't decipher if he is getting frustrated at multiple failed attempts to hang or he wants to hit it and quit it. Anyway I figured he was just a lay & got what he wanted so why is he still messaging me from time to time to hang? I thought it was just a one time thing?
Why is my 'one night stand' still texting me?
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