Is there anything wrong with wondering what it would be like if I am not around ?

No, I think most people do question their worth in others. To know that we mattered to someone.

Unless you were a terrible person, someone out in the world would be devastated when they find out that you are gone.

I have a friend who once tried to harm himself. He was drunk, but he told me that he wanted to see what would happen if he tried to hurt himself. He was scared that not many people would come to his funeral if he was ever gone. I told him "It's not a competition. Because you are dead".

I can tell you from personal experience that when you make a connection with another being, when you are gone, they would be hurt.

Accepting a loss is part of the grieving process; it doesn't mean that they will forget you, rather, it means that they accept that you are gone and that your legacy will always be a part of them.

I would suggest to just live your life to the fullest and try to find happiness rather than worry about who would be coming to your funeral. Personally, I could probably count everyone who would come to my funeral on both hands and it doesn't bother me. It's not a popularity contest. It's better to just focus your energy on cherishing those special individuals that are in your circle instead.