You are a great example.
你真是一个好榜样。

We must accept finite disappointment, but never lose infinite hope. — Martin Luther King Jr.
我们必须接受有限的失望，但不要失去无限的希望。——马丁.路德.金

The best way you can avoid disappointment is to simply not expect anything from anyone.
避免失望的最好方法：就是不要在任何事情上对任何人有所期许。

Don’t blame people for disappointing you, blame yourself for expecting too much from them.
不要因为让你失望而责怪别人，要怪就怪自己对他们期望过高。