It's great that we live in a life surrounded by material objects. These are things that can be replaced. These are things that we choose to buy or borrow and keep so that we can live in style. Sometimes we get them because it is a necessity. We are also in a great position to choose our friends, whom we like/dislike etc. We can choose what life we lead, what we want to study etc.

But we cannot choose our family.

The family cannot be replaced. You cannot choose your brother or your parents. They cannot be replaced. These are the people who will never let you down. So never let them down. Love your sibling and cherish every moment you spend with them, whether it is a fight or sharing a joke moment. You share a special connection with your sibling, realise it and keep it strong.

Try to make it as strong as possible, because you never know what may happen in the future. He/she will be gone and then all you will be left with are photos, videos and memories. The times you fought, the times you laughed, the times you hated each other...they will keep haunting you.
Only Time can heal, so let it. A person cannot be replaced, so forget it.