Can you do me a favour and buy a nice Cotic Soul or Kona Sutra?
I'll take em off your hands when you're fed up.
Oh, and let me know when you're bored with the Lemon Drop too, m'kay?
Seriously, don't give up - I bought a BMX in similar circumstances a few years ago.
Just couldn't get on with it and was convinced it was actually possessed - it tried to kill me every time I rode it.
It stood in the front room for ages silently mocked me as I walked past.
I finally bit the bullet and tried to learn how it worked.
Ride it loads now - you've just got to get stuck in and practice!
A full suss won't make you a better rider or let you tackle anything you can't on your hardtail.
A BMX will, however, increase your awesomeness rating by a factor of three, make you more attractive to women and make you a better guitarist. Fact.
Give it another six months - if none of this proves to be true I'll give you a ton for it.