Wow! I didn't realize you were so upset. If this helps you at all, I also tend to have similar thoughts when people do not respond to me. Through the years I have come to understand that my anxiety about people not liking me is usually a waste of energy. People may become busy, or have a family gathering or need to study or any number of things. So don't let it get you down if people do not respond right away. If days pass and you have not heard back I would worry whether my friend is okay or not. Sometimes there may be a death in the family, or they may be ill, maybe their internet is down. Things like that.
I usually go to bed early because I have to wake up early, so at night I am not as easily reachable. But the following day I answer comments. Just to give you an idea of how ai operate. As for the other folks, I do not know. Maybe some of them can shed some light to ease your mind.