He called me his sister?

I’ve been flirting with this guy for the past few weeks. We’ve been flirting with each other and he has even talked about sex and having kids with me. He thinks that I’m talking to other guys and constantly ask me if I am talking to other guys which he gets angry. I made my intentions clear that I liked him and he was fine with it and seemed to like me back. Today we were talking and he randomly told me I was like a little sister or family member to him. It really crushed me and I don’t want to talk to him anymore. what should I do?

He called me his sister?
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