Good luck
I know how tolerance can increase to ridiculous levels when you are either smoking every day for a long time or have access to your own homegrown Cannabis so you can smoke all day without paying €10 for a lousy gram of White Widow. I only grow a few plants for fun and this years' harvest was of exceptional quality (White Widow / Amnesia Haze / Silver Pearl / Purple Tops / 'Rexcessive' Haze #1 which was Amnesia Haze x Silver Pearl, my first crossbred plant ever :D)
Currently I am only smoking on the weekends since last week and I find it quite hard, especially when you have been smoking your own Cannabis for over 4 months. I rolled fat blunts & joints and gave some away to a few friends, but now that my stash is nearly empty it's time to contemplate about my usage and tolerance.
Try smoking different strains of Cannabis, that is if you have a reliable source that has some good strains like Northern Lights / Jack Herer / Super Skunk or maybe even some hash like Maroc / Tibisla / Afghan.
I agree that quitting for a while is the best thing to do, however some people don't have the willpower to stop for a few months (like myself hah) so try lifting weights for example and smoke only on weekends. Also, setting a certain amount of money that you will spend on Cannabis might help, another tip I can give you is to smoke Cannabis that is grown outdoors, for some reason the switch from indoor strains to outdoor strains gets me higher.
If you really want to stop for a few months you can PM me when you crave Cannabis or just want to talk about the psychological part of stopping since that can be hard, I respect you for trying to stop, I'm sure I couldn't do it so I wish you good luck and I hope you will get the high we all love back again.
Sorry for the long post, I always tend to write long posts while high on Methylphenidate.

I could write a whole book about Cannabis since even after 7 years of smoking I still love Mary Jane.
Peace & good luck o/