Nope, I don't have any bias about your situation. I am simply making common-sense statements. I don't have a horse in that race, so whatever you do won't matter to me. I was only curious because you left out a lot of information and without certain details it just sounded like a kid mooning for a fantasy. TBH, it still does. What you've got going does not sound mature and healthy; it sounds like something very flimsy - but I know that will be hard for you to see. You think it's love you're feeling for this person after only a few months of erotic role play and some personal conversations. I think you are setting yourself up for a hard fall.
It is no wonder your wife is having a hard time with it - what, exactly, are the efforts you are NOW making to nurture your marriage and let your wife know she is loved, appreciated, and sexually desired? Or is it only the online chick you desire, and not your wife?
And you still haven't come clean to her about everything you're feeling - correct? See, holding back information is the immature part, like a kid holding onto a prize out of fear it will be snatched away. Still, you say you've only been interacting with the gf for a few months. That is not really enough time to know someone well.
I think you've got a very messy situation here and you need to see it for what it is, not what you wish it could be.