Sounds like you have a very caring bother. Now that he knows what you are going through he could be a big support person for you in the future. Hopefully he will be there when you need someone to listen.

But do keep writing whether in a journal or using something other than email to write unsent letters. Writing is a good practice of getting your feelings out. If others have access to your computer there are journaling software programs that can be password protected.

Best wishes.