Casual sex can also lead to AIDS and other sexually transmitted diseases. There is also a misconception that condoms can prevent the transmission of AIDS and that is not true. Death of a friend or relative can be hard to accept at anytime. The younger the person, the harder that it is to accept their death. If you find yourself depressed over the death it is best to talk to others about it and possibly seek professional assistance.
Death can come at anytime.
The right friends and relatives can help you to deal with the death. People who practice a religion can deal with death easier because a religion gives a person hope that after death there is something to look forward to that is better than the life that is lived here on this earth. Here is a book that may be of help. You are not alone. When I was younger, I was extremely shy.