Anyone is a pronoun that means "any person." So if you would like help from a person and you don't care who that person is, then you would like help from anyone. ... Anybody is a pronoun that is interchangeable with anyone.
I think that rimantic love, by its nature, is subject to scientific proof because we have many changes that happen to us. Like our heart beats faster, we sweat, or we blush. And I think that any individual person can in fact feel love for someone else