hii I admire you for positive outlook. you have tried SSRI but it is not useful. for how many days did take ?? best will judge after marriage. masturbation and sex both are different process in term of excitement. sex is mutual act. you can not say premature on basis of only masturbation. So relax Need to calm down your anxiety will affect your sexual functions sex is mutual act and by time you will learn proper education is must premature ejaculation can be treated with both psychologically and drug therapy psychological means to learn how to stay long certain methods like women on top position condoms lubricated with benzocaine kegel s exercise will help ful .please read on net and learn how to do it stop and start method of sex is very good results. it is thought diversion method and require time to learn . search on net to do it proper way read more on google masturbating before sex can increase your time proper play and understanding is needed drugs like dapoxetine will help. i prefer it in my patients. so by time after marriage you will learn on basis of your experience and understanding take care Thank you.