I am 53 , I still can have sex , my issue started about 3 ye

I am 53 , I still can have sex , my issue started about 3 years ago ,my wife had to have hysterectomy, since than she has no interest in sex or intimacy, and I guess I became premature ejaculater from
masterurbating so much , so I guess there are 2 issues , I guess I’m looking for advice , I have never cheated on my wife , don’t want to , but I’m starting to look at other women , even women I never found attractive,and thinking maybe if I have sex , I won’t have my issue .. confused