TV is sort of like caffeine (another thing I gave up - though that one wasn't by choice, but required by my doctors) in that you cannot imagine yourself living without it and wouldn't want to. And the first few months of abstinence are genuinely very difficult.
But eventually it gets easier, and then it gets completely easy, and then you actually feel as good or better than before. And once you finally become accustomed to it, you can't imagine going back to the old way.