If we love a person with true love we never find any mistakes over them.
Dump all your ego's
Argue more, fight less
Love more and gift more
Respect their words and ideas
Say Sorry when u make mistakes
Say that you Love him/her
Dont hide anything
Be romantic don't be very formal
Introduce to your friends
Go for a long trip
Allocate some time and talk to them about your day
Dont talk when your partner is in anger give them space
These are the best things i saw in some relationships.