Some people are not capable of giving you what you're trying to get from them.
Don't count on others to hand your life to you.
Don't accept that others know you better than you know yourself.
The only person you will live your entire life with is yourself.
Don't just get mad, try a little creative revenge ... Creative revenge ... allows you to get even - to extract some satisfactory justice - when you are wronged, but lets you do it with a sense of humor, not boiling malice.
No matter what you do in life, someone important to you isn't going to like it.