This constant questioning - why am I here? why am I doing this? - this constant hankering for the why, is a disease of the mind. answer is going to satisfy you, because the why can be asked again. If I say something -you are here because of this - the why will be pushed back a little, that's all. You will again ask: Why? The why is non ending.
Once you understand it, you drop it. The why is ridiculous. Rather than asking: Why am I here? it is better to use the opportunity, it is better to flower, it is better to exist authentically. And this is the beauty of it, that once you start existing authentically, truly, once you stop all nonsense thinking and you start delighting in life, once you are no more a philosopher, the why is answered. But it is not answered by anyone from the outside - it is answered by your own life energy.