What are good reverse babble responses to the to the common fog talk:

the I love you not in love...
the we never should have gotten married.
the I have to see if this is the right thing...

I love you too, babe, and I'm still in love with you. I'm also still married to the one I love and I'm willing to do the work to help make this marriage what we both want.

The love we shared when we got married was a strong as any love anyone has shared with their (husband/wife). We can still renew that love that you felt for me then. I have a plan to help make that happen. But it can't happen when there are three of us in this marriage, as currently exists.

I always thought the "right thing" was to honor our marriage vows. Love, and cherish, and honor each other until death do us part. That's what I am willing to do. Last I checked, I'm still alive and well. How can it be right to bring in a third party to our marriage and expect our marriage to be successful?

All the above to be stated factually, without any emotional whining or nagging or any other "overtones". Just normal conversation. Little reminders that his words make no sense. Use words or phrases that remind him that he's married, and engaging in damaging activities to you marriage, but not spoken in anger or with attitude.

Just some thoughts...
SD