I am sort of new to this whole "Computer" thing, but I need marriage help?

I am having some problems with my husband, Eddie. For the past few years, he has been seeing some young chippy behind my back. He thinks I don't know, but OH I know. I recently decided to give him a taste of his own medicine, and I started seeing our next door neighbor, Tex. Well, he's not the neighbor, more like the neighbor's tenant. We get together and do fun things that Eddie won't do with me anymore. How can I get Eddie to stop seeing his little slut of a friend and come back to me? I am only using Tex to get back at Eddie. I am so torn, help?