How can I defend my journey to friends?

You dont need to justify yourself to anyone, you only need to be confident in doing NoFap for yourself. Regarding potential medical problems that may arise from not ejaculating, your body will make you have a wet dream if it truly needs to, if not then you will be fine, there may be some discomfort as you adjust to it but as far as I am aware there are no serious medical conditions linked to NoFap that can be backed up scientifically and arent just based on myth.

 

Sounds like your friend is a sex addict also. Bless him and i hope one day he realises how wrong he is.
A sobering thought is.. Just imagine if suddenly the internet crashed for a long period of time along with the phone networks and electricity supply ..ie no access to porn.. Id imagine there would be some very desperate people having to face reality roaming around! Not a great image really.