Ok well the not paying for porn thing is strange because what you're essentially saying there is you're fine with just, free porn, which is...super exploitative.

Further tho...man he could have found all of that for free. Dying.

Lastly - addictions are things people are ashamed of and it doesn't seem like it should shock and surprise you that he'd hide something he's embarrassed by. He wasn't taking advantage of you. Your entire relationship is not a lie, he just has lied. I personally think a person can be dishonest about some things and that doesn't make them and overall dishonest person. But that's just me.

If you can't deal with it, don't. You're 26, you can get divorced with pretty much no consequences.