Hello, I'm new here,but this has been bugging me for a while, I just need to get this out of my chest, cuz I have never spoken this to anyone close to me.

Here goes.... "deep breath"

I'm 23 years old this year, I'm employed(prefer not to say my occupation), but I enjoy my work. But since High school and university, I noticed I'm a little.... different from others.
While others have been enjoying the fullest out of their lives, I have been thinking a lot and kept asking questions, and these questions are abnormal.
Like
"What's my purpose in this world? "
"why was I born into this world?"

Ever since then, I've been putting the priority and the well-being of all others above my own. I felt like I don't deserve happiness, I should shoulder the burden of others and make them happy. I could not find a purpose in my life, so I have been focused on a mission to consistently helping others.

I still do enjoy the simplest pleasures in life, but I don't have any infatuations or obsessions. Normally, a person would be happy when they were offered money, but I'm just like "it's just money". That doesn't mean I don't need money, I meant that I only need money to live my life, I do not wish for a luxurious life or a happy life.

So should I be worried? Am I depressed or insane?
Or I'm just different?