First of all, no matter which way things go, there is no reason to leave these boards. We are interested in you and want to hear from you.
As to whether it is possible to maintain marital love while having an affair....I think it may be possible. Just as a gymnast or acrobat does tricks with their bodies that are not possible for the rest of us, I do believe there is the occasional person who can maintain one love while pursuing another. But this is a circus act. And I don't think the average person, including your wife, can do it. So... no, I think that new love kills old love. And I think that your wife is seeking the comforts of life and stays with you because you can provide this. That is, you have become her Sugar Daddy.
If she is going to "fall in love" with you again, it will be after you pull the rug from under her feet.