Sheez oh petey, Foo Fighter, you need to get a life separate from your wife! I hope you are going out with friends and TALKING to women, men, etc.... Go out on weekend nights, have dinner with friends, flirt a little. Just because you are talking and flirting with women doesn't mean you are going to have sex with them (unless you want to.... just kidding!!!).
Be more mysterious. Let her think you are dating.. but if she asks, just say nothing serious. You are still married afterall. Be busy sometimes... definitely act like you are moving on with your life and live that way. Don't make this all so easy for her. It's okay to listen and be a positive ear sometimes, but have your own life. You need to do this for you regardless of where this whole thing goes. And stay away from the relationship talk!!! Work on YOU. A healthy, hunky, positive, mentally and physically healthier guy!!! A guy any woman would want to meet. Hey take advantage of that cool accent!!!! American women always swoon over stuff like that.
And if you suspect anything with your son, don't hesitate to call CPS. What you've described sounds suspicious to me. I personally wouldn't want to wait until something really bad happens. In the meantime keep in contact with teachers and request school counseling immediately.
There is no arriving, ever. It is all a continual becoming.