its all in your head (on your head ha)
no seriously
Shave it.

My hair thinned after heavy drug use, i gradually worked my way down the clippers until now i use a mach 3 and some moisturizer
i noticed some girls i would normally attract with hair were not interested when i was shaved
but then others love a shaved head
swings and roundabouts

shaved head makes you look harder, more alpha
i would also suggest a couple of tattoos and muscles to finish it off!