You seem to be having a hard time of it at the moment. I don't believe that your thoughts and feeling are usual in that many of us have gone through a similar turmoil of feeling alone. I know I have. But like others have commented here, writing a post is often quite hard to express one deeper thoughts and often I've deleted a half finished post because it just doesn't sound right.
Ultimately though, we shouldn't take the words of others too personally, but rather try to just conciser them as just another opinion, one that may in fact be completely wrong. Hard I know when it seems cutting ... but that's what we got to do ... or we'll end up constantly feeling hurt and never get the benefits this place can offer.
It may seem like a long road at times but don't give up, you'll make it in the end.