I'm very sorry you are dealing with this but do NOT let this man make you feel like he is the victim. You should not have invaded his space, but reguardless of whether or not you would have looked on his computer those russian sites would have been there and he was still looking at them. This does very much so give you a reason to be upset. You have been through a lot if you are on this site right now, you don't need to continue your pain by keeping yourself in this relationship. This type of thing could really hurt your recovery and your road to happiness. I hope that you and he find some way to not hurt eachother and do what relationships are supposed to do, make eachother feel better instead.

Either way I wish you all the best and am terribly sorry you are going through this. Please take care of yourself and know that you deserve better than that!