What have your doctors told you?
Have they told you you have an advanced or aggresive cancer that is likely to kill you if untreated?
Or have they said it is too early to know that?
Have they mentioned a Gleason Grade, and a 'T' stage? Do you know whether it has spread to your lymph nodes, or your bones?
There are a whole host of treatment options, it might be that they can do what is called a 'nerve sparing' operation, which would enhance your chances of a good sex life, but it might be the case that they have to chop the nerves because of where your tumour/s are located.
You may be a candidate for external beam radiotherapy and/or brachytherapy?
It may be the case that they recommend hormone therapy, either on its own or as part of any of the above.
There are other treatments such as Hifu, and sometimes doctors will advise doing nothing at all, other than watching and waiting.
Untill you know these things and can share them with us on this website, it is very difficult for anyone to give you relevent thoughts or sound advice.