Re: Losing the passion
 

Try dropping down to a level where stakes are pretty inconsequential. Open up 6+ tables of sixmax and see how well you can play. I saw this advice in SSNL but I think it would be good practice for HU players too. You can work on skills that will make you a better player and earn money, or at least, not lose very much.

Re: Losing the passion
 

When I'm going nuts about my regular games I often register into a 'as cheap as it gets' rebuy MTT and have LOTS of fun.

Nice point by DaveT indeed