Be careful... It is not just too high of expectations. It is expectation itself. What expectations do you have that fuel selfishness?
I don't believe in expecting. It is a setup, a premeditated resentment. It hurts me more than it does anyone else. I feel this was a lesson that God taught me a long time ago. I may not always get it perfect, but I do my best to keep that lesson in mind. It was a hard one, a life lesson and one not easily forgotten. or as my dad would say, a "hard knocks" lesson.
If you believe it or not, it is human nature. And with Christ you will be able to change that and allow Him to manage those.