Tolerance. That love will turn to longing in no time if you keep those binges up. Always leave 2 days between use to avoid major tolerance problems. I used to get the most awe inspiring, weird, amazing effects from K and now I feel detached, and when I come down, as if I have a fever or something and that is ALL it does for me now. Even after a 3 month break, I still have tolerance. It's not like I'm not getting fucked off it, it's just a different, far less interesting high, no visuals, no gravity effects, just a messed up detachment feeling.
EDIT
It is weird how efficiently I gained a heavy tolerance too. Guy above me was buying ounces? Most I've bought was 3.5g, and in my whole use, at MOST it would be 2.5 ounces I'd think, over almost 2 years. That's messed, I blame the binges though, doing it 4-5 times a day for up to two weeks at a time, then leaving a month, sometimes a couple, the breaks don't really matter, they just stop the tolerance from going up, but it never comes down once you have it.