I don't want to be the downer guy, but maybe you're just not into it.
I mean sure, I've had some times where I would rather just stay home and hang with the wife and kids, watch a movie, etc. Sometimes, I'll go ahead and give in on that impulse.
But generally, I'm moving in the opposite direction. I become mentally distraught if I don't train when I'm supposed to. Too many days pass, and I begin to yearn for training.
If you don't get that yet, you either haven't been doing it long enough and need to give it a fair try, or you just aren't into it.
There are plenty of other worthwhile activities out there (not for me, but I'm not you).