According to your mail, your social circle is quite small. Due to your personality, you may not be having many friends. As a result, you feel depressed under stress when there is no one you can turn to. You should try to take on some hobbies according to your interests, and engage in more group activities such as programmes organized by community organizations. In this way, you can meet more people, and hopefully, it will also change your way of looking at things around you.