Perhaps you constantly wonder what life is for because you realize that there might be a meaningful answer to your question. I often think about the same thing, and it helps to believe that eventually my questions will be answered. Seeing as you said that you are “deep”, I imagine it would be quite difficult for you to just accept things as most neurotypicals do. Don’t lose your curiosity, it is a trait that too many people give up as they age.
I am sorry you are feeling unmotivated and depressed (I am assuming this is how you feel based on the subject). Did something specific happen to generate these feelings?