Your wife is the only one that can make you happy? Are you happy now? How happy has that wife really made you? My guess would be not that happy. She has put you thru heck.
I used to mix up lonliness and happiness with my exh. I think I wanted him back to cure the lonliness and not have to face the uncertainty of the future. The familiarity was much easier.
Me: 46 FWS: 36 Married and Divorced 4/07, Pregnant 7/07,False R 7/07 Baby Girl born 3/08 Kicked him out because OW: 7/08 5/10 He realized what he had and lost. Moved home! REMARRIED 3/14/11!!