Why do some people romantically pursue a person they don’t really like?

I’ve been seeing this guy for 3 months. In the beginning he acted like it was love at first sight but as time went on I realized that he was never that attracted to me not did he care about my feelings and needs. I was just a tool for him to fulfill his needs yet he still acted very insulted when I accused him of using me and not liking me as a person. I never had sex with him and I wasn’t overly nice to him. Why did he try to keep me in his life if he didn’t like me and didn’t consider me attractive?

Why do some people romantically pursue a person they don’t really like?
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