What if Castiel didn't come back after Goodbye Stranger?
Yess I know he's coming back.. But what if he didnt!? XD

Dear Dean,
It's been so long that I doubt you'll even remember my name. Its been so long now that I doubt You even remember the time we had together. I suppose its easy to forget someone when they were in you life for a mere few years before disappearing. You'd have every right to have forgotten me. I's been so long since I even said goodbye.
I guess I'm writing to you to ask you if there's still a place for me in your life. I thought I could live without you. I thought I could protect you and protect this tablet on my own. It seemed I was wrong. It's taken me almost 25 years to realise it.
I can accept you as being nearly 60, old and grey. You're magnificence wasn't just your looks. If you have not lost your old self, you will ever be the beautiful, timeless man I loved.
Is there still room for me? Have I lost my place? I can't live without you, Dean, it took me too long to realise it, don't make it any longer. You saved me in every way. Don't leave me like I left you.
Cas …