People

Sometimes, I just don't understand how does people actually feels and react..
They can be nice to you for today, and then the following day, they can just act like they don't care and couldn't be bothered.
I realise that the person which is the most important person to you and you think that he/she will be there all the time will also be the person who will hurt you the most. I don't know about others, but this is what happened to me..
Recently I don't know what went wrong, that person has been avoiding me though.. Maybe asking him to care more about me seems wrong.. I really don't know what he thinks.. My mind is filled with questions at the moment.. Hopefully there will be answers to it as soon as possible.