Dear Person,
You sorta upset me last night. You really don't know how much I care for you, do you? I guess you wouldn't, because I'm too much of a chicken to tell you. I was hoping it would be obvious, but I guess not.
Just wanted to let you know you are the best big sis in the whole world and are the greatest listener and have so many good ideas and information on any topic I need to talk to you about.