Hi misskeena, it does take a while for some threads to get responses but please don't take it personally. I have had posts that never got any responses but have also found support with other posts. I really don't think it is personal.
As for feeling that no one would really care if you were gone. I feel the same sometimes. I see those news stories about how someone went missing and how devastated their loved ones were and I can't see my sibs or friends feeling that way...I did have one person that truly cared for me and I hang on to that for comfort. If you don't have that one person, don't lose hope. There is someone out there who needs you as much as you need them.