Relationship - Tips

To build a sustainable relationship in life look at

Forgiveness when things are hard to accept
Sacrifices when there are lot of differences
Support becoming better version of self
Appreciate the differences and accept in Larger context
Look at it as win win not as predator prey 
When you value yourself well, you will value others well too
People who are good to themselves will be good to other's
It takes a lifetime to understand life, the sooner you realize the more meaningful life becomes