i need help translating the sentences below.

...Ben senin sadece imkansizindim. Öyle bir anda gel k! vazgeçmek mümkün olmasin.

thanks

 just learner, my try

only I couldn´t stand you. you can´t give up so come at the moment

I was only your "impossible". Come at such a moment that it would not be possible to give up/abandon.