Wife rejects .?

I recently lost 160 pounds (weighed 335, now 175) I work out daily, went from a size 56 waist to 32, and always dress nicely and get so may compliments form many females..except my wie. She is beautiful, and actually lost 50 pounds herself..now weighs 120. I did all this to be more attractive to her, and it has backfired...I am lucky to have once every two or three MONTHS now...and it is all not romantic, and she seems to not enjoy it. I am 51 and we have been married 29 years. . I am confused. I get hit on by local women everyday now and I do not want to stray.