I don’t get him smh

I’ve been dating this guy for three years okay? He broke up with me and three months later came back and said it was a mistake that he did. At first he told me he liked me as more than a friend then three months after he come back he says he loved me and wants a relationship with me. Now we started dating for three days and he says he doesn’t think he actually loved or liked me and it was all in his head and broke up with me. He says he was confused and he apologized for it. He constantly wants to see me still and it doesn’t make sense to me . He told me he gets upset when he sees me with someone else and I’m his

The way he acted to me at first was like he was in love with me all over again and he told me he wanted me forever. How could he not have really had feelings for me?