I agree with FlyingHigh... don't do anything on the spur of an emotion! Breath... Breath... I kicked my Husband out because I was feeling JUST LIKE YOU. Think about it first. I know how you feel, you just want it all to stop so bad. You feel like you have no control over your life, I know it is a terrible feeling.
Sometimes you don't - I found out the hard way. My H is still in contact with the OW (2 times a day) but at least he is back home now and I am "piecing". I still don't know which way it will go, but I am still trying.
Have you read the book Divorce Remedy? Get it and read it. It helped me. Hang in there. I know it is hard and it feels like your heart is being ripped out. I know. It hurts. But don't lose hope. Don't give up if your R is worth it to you. Breath...... Breath......