Don't fall in love with me...

I'm sorta going out with this guy, I like the sex and I like the guy. However, I am not in love with him. And I kinda feel as if he really likes me a lot. So yesterday before he dropped him off, I looked at him in his eyes, held his face and I told him, "I like you, but please don't fall in love with me." Was I wrong for saying this? How would you feel if a girl tells you that?
Don't fall in love with me...
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