There is always a confusion amongst us human beings about the concept of want and need. I am no expert myself but I did ponder over it and would like to share my thoughts with you as well.
So a child is crying . He fell down from his bed and is hurt. He wants comfort but he needs his mother. There is a difference. If his sister or brother comes and picks him up and hugs him, he would stop crying but he would be totally fine internally only by his mother.
A young teenager is feeling lonely and upset. She wants company. Her friends give her company but she needs a companion. She needs a boyfriend. She wants love just like any other teenager across this world.
A man wants a successful career , money and family. What he needs is support and love from his friends and family to achieve it all.
Lets come to me. What I want is to become a famous author and touch millions of hearts like my favourite authors did : J K Rowling, Jane Austen, Cassandra Clare, E L James, Leo Tolstoy, etc. What I need is not too different in this case. I need to write and write. Write everything that comes to my mind. Edit it again and again. Re-read it . Thats what I need to do to get what I want.
So do what you need to get what you want! Or do what you want to get what you need !! Its still confusing.