Ever since I was a kid, about 5 years old, for some reason if I ever noticed that someone was in a lot of pain, or really angry with me, I found it funny. Most of the time I bit my lip because I don't want to hurt someone's feelings by laughing but there are times when I just start to laugh if for example my boyfriend is crying. It's really weird and it even creeps me out. Why am I like this? Am I some sort of sociopath? I don't think so, because usually immediately after I laugh or hold back my laughter I feel guilty for finding someone's pain or sorrow funny. This only happens with people I am really close to, no one else. I'm not sure if this is because I have BPD or this is something else entirely. Anyone have any idea what's wrong with me?