It could be be a use of something you "liked." I had that happen to me. A very old friend, one who I dated for a long time, starting on high school, unfriended me because of my political "likes." It's very funny, too, because back then he and I shared the same positions, in spades. He is a very judgmental person, and is working on his 5th serious relationship, having been married and divorced twice, lived with two other women.
Some people take FB far too seriously. Don't worry about it and enjoy the people you can share with.
[This message edited by scaredyKat at 12:16 PM, December 27th (Friday)]