Welcome to HealingWell and the Depression. I am so very sorry for your loss and I know losing a friend is a very painful experience.
I would like to see you sit down and talk to your parents telling them how you feel at this time. Perhaps it is time for you to see your physician and have a good physical check up.
You may benefit from some kind of counseling as your kind of stuck right now in your life.
Does your boyfriend feel the same way as you do as you hinted you don't want to miss any of his emails?
Remember you are a very important person and learn to love yourself.