Maybe I’m overthinking it?

I’ve known this guy for a long time and he always been grumpy and mean everybody knows him as that. But we always argue and would stop talking and he’ll come back adding me on Facebook say he miss me and etc only to end up being rude and mean to me again telling me to delete his number. He asked me to come visit him when I got there he never came out he texted me to go home out of nowhere after asking me to come to him, I was confused then he called me a liar saying my car wasn’t there but I don’t get it I sunt him a picture of me there and even FaceTimed him. If he’s always being this way towards me then why he always come talk to me saying he miss me years later?
Maybe I’m overthinking it?
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