We come across many situations in life where we need to fight with them to retain our roots and become stronger and one such is relationships. Everyone faces different types of problems so can overcome them together some can make them worse by misunderstandings. So I am going to share some tips according to my experience. 

1. COMMUNICATE: communication is the key to a success full relationship. you should let your partner know what are you feeling. Put your thoughts out. A relationship is built by both their efforts. If one speaks and the other listens and does nothing the relation will tear apart.
2. Don't Argue: When two people argue there is no understanding only noise. Let the other person clear out their anger then sit and solve the issues. Issues can be talked about, discussed, and solved, you don't need to fight for that. 
3. Space: Give each other their own private space. You are just a companion who is gonna help them with their growth for a long time. You are in a relationship with a person necessarily doesn't mean that the person should give you his/her whole time. Each and everyone has their own priorities and space so let them take their time for their own personal growth don't keep hovering, this may cause the relationship to fade. At the start, you may have time for each other and spend some lovely time together but that necessarily doesn't mean it will be the same every time.
4. Put yourself first: Always put yourself first. It is important to be selfless towards the other person but that doesn't mean you keep thinking about them 24*7, there must be a limit give time to your hobbies, your interest do the thing which defines you. You don't need to stop doing things for the sake of others unless and until you feel the need to stop. 
5. Be in awe of the other: Do compliment each other once in a while, be honest with your compliments. Do support them in their work keep appreciating for doing hard work with this they will feel blessed to have you and also focuses on doing much better work. Every person is really stressed with their everyday work so be with each other ask them how their day was and share things give advice if only need but do listen to them.

These are some points that I realized a relationship should hold so that they have stronger roots. hope these help. Cheers.

-Krishnapriya