Wow that's some weird powerful stuff. I'm confused about your lack of control when he's in your dreams. Do you just not realize you're in a dream or are you like just flowing with the dream and can't break free like it's a film?

If you're a lucid natural I figure you could just tell him to 'go away' or 'get out' to take your dream back. This guy seems like a perfect dream sign too, every time you see him you must be dreaming.

Try telling him to "go away" or "get out". I'm sure with practice and will power you can take all your dreams back. On a side note, I'm one day younger than you

I don't mean to pry but could he be [manifested by/linked to] male figure(s) in your real life? or lack there of.