Why would he ghost me after making plans?

My ex called me out of the nowhere multiple times after not speaking to him for weeks. He always acts like he can’t remember the last time he talked to me or the last time we had sex. The last time him and I spoke I rejected him and he just hung up. He wanted me to come over early afternoon but I didn’t want to drive to his place so I demanded he come over late at night around 9 to my house. If nothing better came along, he was invited I told him. He said he would call me around 8pm before but never did. I even called and texted but no answer.

Why would he ghost me after making plans?
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