Your initial post makes me think you're clinically depressed. No biggie, easily treatable. Sort of like a flu...of the brain. Statdoc can hook you up with some meds.

As far as the 'coitus' suggestions, keep this all-important mantra in mind: They (i.e. women) want c$%k more than we want p%^sy.
I just wish I had realized this back in HS.