Hmmm, I did not vote, but I can see how ANY of those things would make a person feel unliked...whether or not they were liked.
Replies to posts could be few if the topic was not interesting to people, er if people were not around etc...lots of reasons for that.
As to leaving chat...if everyone left chat as soon as I entered every time I would certainly think it meant something...but people tend to leave chat in groups it seems, so if it happened every so often I doubt it means anything.
People sending malicious or hurtful messages er emails does sound like they have an issue tho..tho, I have had a few people send emails that I disliked dif places on the web....and there turned out to be other reasons for the message...and not me personally.
The easy way to find out is just to ask the person straight out if they dislike you.
But...I would advise to just try to relax and not worry over it so much. Just be you and enjoy who you are.