I don't use email a lot for friends, but I have noticed texts that go unanswered here and there. Sometimes it makes me second-guess myself, like did I do something wrong to make them not wanting to talk to me? Usually it turns out not to be the case, but it bothers me sometimes, especially since I've been rejected by people in the past. Sometimes this makes me not reach out to people as much. I try to avoid jumping to conclusions though, otherwise I drive myself crazy.