exercisestolosebellyfatfast.com

so this girl that hooked up with the guy that I was previously hooking up with (long story) they were friends on facebook (and he and i are friends on facebook as well) because when i looked at her page he was a mutual friend of both of ours. So when i went to look at her page today, i typed in her name at the top and it said her name: 13 mutual friends. i clicked her name and at the right hand side, it only said 12 mutual friends. so i looked at our mutual friends and his name is no longer on the list.
then i went to HIS page and searched through his friends, and her name isnt there. is there some way that she could like block that she is friends with him so i cant see? i just dont get why before i click it it says 13 mutual friends then when im at her page it says only 12. so idk unless it’s just a weird fluke and she deleted him bc she realized what an ****** he is! either way, they dont seem to be friends anymore, unless there is some privacy setting that is blocking this whole thing.