Happiness is a standard to check what you do is correct or no..
For example :
You feel happy after helping people ( do it )
You don't feel happy cleaning up the house ๐ ( don't do it. You family members can do it or you can pay for cleaning ๐งผ๐งน service)..
I used to think that we must accept and love everything and do everything by ourselves. Actually, our heart is a guidance. Like it or no. Happy or no.
A good thing always keep you happy and optimistic.