Well, no your not the only one.
People have vented their frustration with their Wii's for some time now, saying similar things to you.
But there are good games out there, and good games coming.
Games to check out now:
Metroid Prime 3 and Super Mario Galaxy.
Super Smash Bros. Brawl, No More Heroes, Wii Fit and Mario Kart.
Its all about finding what you like, and ultimately when it comes down to it, if you still find yourself bored, it may just be that the Wii is not the console for you, in which case, you can either sell it, or keep it.
I never get bored with my Wii, I have played some great games on it.
And if I am waiting for a Wii game to come out or become available I play a Gamecube game or play around with the various channels on there.
So before you make a choice, and say your really "bored".
Make sure you make good use of the Wii's potential and features it has.