Hi Hikebike
I would truly recommend that you tell the whole truth and not just the last three years. This will for both your sakes especially yours. Imagine keeping up the deceit and being in perpetual fear that you will be found out. That anxiety will only make things worse. There is only upside by being transparent and honest. If you explain your addiction and the reasons behind it, then if she truly is the one, she would be understanding and supportive. If she isn't, then you know her character and beliefs aren't a match ( and you've probably dodged a bullet down the track). Just as importantly, the burden of lying will be lifted from your shoulders. That is liberation !
Take a deep breath, add some grit and be brave ! We're rooting for you !
Oh and maybe think about abstinence...just sayin'
