GTA IV NO MISSIONS

hello i need help in GTA IV. I am on end game. My last main mission I think was (You need destroy Dimitri's vans. Now i dont have missions. only jobs of Little Jacob and Brucie.

I found what your next mission should be. "That Special Someone is a mission in Grand Theft Auto IV. It is given to protagonistNiko Bellic by the United Liberty Paperagent". http://gta.wikia.com/wiki/That_Special_Someone There's a little more info on the page but it's mostly spoilers.

You're already done with the game.