When there is genuine trust between two people that each will discuss their needs and hurts openly, there is no fear of losing love and their love will grow forever.

You have a good relationship when three words are passing between the two of you all the time: Please, Thank You and Sorry.

Please shows respect for the other
Thank You shows appreciation for the other
Sorry shows care for the other

The most important words in any language's vocabulary are thank you and sorry. As long as you can say those words and accept those words you will have meaningful relationships.