Dream on!

"Realistic people" who pursue "practical aims" are rarely as realistic or practical, in the long run of life, as the dreamers who pursue their dreams at the risk of everything.
 -- Hans Selye

I doubt very much that at the end of your life you will be wishing you had been more practical and realistic in life.  Evidence and survey statistics clearly indicate that you will wish you had taken more risks - to attempt more, be more, celebrate more, express more, feel more, give more, ... love more. 

Understanding this, take a look at your current situation in life.  Are you letting your brain out-maneuver your heart in steering your ship?  Are you playing it safe?  Have you ever held the wheel of a sailboat in a squall?  What a rush, and there's no way to handle it but to turn your face to the sky and scream (kind of like the legless Lieutenant Dan, strapped atop the shrimp boat, Jenny, in the movie, "Forrest Gump").  And, if you survive, you will have known what it is to sail.