Dear friend,
Hope you are feeling less depressed after talking to you. I hope I am still there for you, as you are here for me. Thats friends. I know I feel better every time I talk to you. But you know, you arent here to solve my problems. You are already important when you listen and give me advises. So dont let my problems, or your other friends' problems to make you blue. I hope you are going to be still here for me.
Signing off,
Friend's friend