What do you think Cas's vows are in the Destiel wedding lol
"Dean, meeting you has affected me so profoundly that I I have no words that can truly express it but I will try. Dean, knowing you has not only taught me about love but allowed me to love myself and believe I am worthy of the love others are willing to give me. And for that, I promise I will never take for granted the love your brother has given me, I only ask to spend an eternity loving him and guiding him as he has done me, please allow me to seek your brother's hand in marriage. Now hurry up and go to Crowley, he's waiting for you with the triplets."
So there you have it, lets turn this Destiel wedding into a Sastiel wedding!, with a little Drowley sprinkled on top. I'm pretty sure my anon here was being sarcastic when they sent me that ask, but if you weren't and were actually seeking a serious wedding vow from Dean to Cas, I'm sorry, I misread your intentions but I also don't ship Destiel anymore so this is what you get.