But if you genuinely like a person because they are "themselves" and they change to the point that they are no longer "themselves" ... it is understandable that the "like" or amount of "like" may change because the person is no longer all the things that made them likable to begin with.

If I liked A, B, C about you and you become X, Y, Z .... its fair to say that you are no longer what originally made me like you and unless I like X, Y, Z the same as I like A, B, C my "like" for you may increase or decrease or cease to exist.

Just a thought.