There are a couple of ways I deal with being tired of or frustrated with poker. I may take a break from playing for a few days, and refocus my energy on studying instead (which includes reading books and articles, watching training videos, going over hand histories, and fiddling with PT3). Sometimes, I don't completely avoid playing, but switch from my main game to one of the lesser played variants of poker (e.g. Stud 8, O8, etc.). Finding different ways of engaging in poker, and occasionally mixing up my routine, keeps the game interesting for me.
It also helps to candidly evaluate how you've been playing. How much of your losses can really be blamed solely on "run bad", and how much of it was due to bad play? Maybe you played immaculately and every single big pot you lost was unquestionably a cooler, or maybe there were spots where you didn't play optimally and lost more than you should have. If you post some hand histories, you may be able to gain some fresh perspective on your play.