It is one of the key things in making a relationship work. Without it a relationship will break down even if everything else is perfect. Being supportive links into a lot of different things, love, trust, caring.
So if you do not support your partner then that will leave you going no where fast. Even if you don’t understand why your partner is doing something then that is okay, as long as you are there for them when they need you.
When someone doesn’t get support from someone they love. They feel alone and will struggle more to deal with things. Think about everything that was important to you, how would it feel if the person you wanted to spend the rest of your life with wasn’t there to help you with it?
No one likes to feel that nobody is backing them up. It undermines their confidence and they may begin to question their own feelings. Say for example you and your partner had different views on parenting. Unless you can lay down some ground rules and agree on something. One of you is always going to feel like the bad parent, and that they have to do everything on their own.
Remember you will not always agree on everything, but once in a while think about it from your partner’s point of view and make an effort to support them in it.