I just finished the Imperial Army quest line and fast travelled to Whiterun to sell and gear up for some more adventure. Out of no where Hadvar comes running at me sword drawn and just follows me around like that everywhere spouting out his random sentences when I click on him. He's not in any other city but every time I come back to Whiterun there he is looking like he's about to stab me in the back. Is this a glitch or something?

yeah same thing happened to me, probably a glitch.

Ah ok well that's lame.