When I went searching for a quote on expectations I was surprised at how negative everything was: don't ever trust anyone...they'll just let you down kind of things. Not inspirational...or helpful at all. I did find one quote that I really liked and hope it helps you not necessarily give up all of your expectations but to manage them so they are a positive force throughout your life and your relationships.
"When you release expectations, you are free to enjoy things for what they are instead of what you think they should be."
~Mandy Hale