Have I been doing NoFap incorrectly?

I have been on this journey since January 2018, since I discovered NoFap, in order to stop my porn addiction and cure my PIED. I would say, for 95% of the time, likely more, I have been PMO free. However, my PIED has not gone away. My condition has been at its best after a couple days after fapping after a long streak(60 days+), then it would go back to being semi-dead. By the way, I have not been able to attain a 90 streak, yet.
Is not doing PMO, enough?
Do I have to do other things, in order to cure my PIED?

Are any of these preventing my progress?
1) I have had the bad habit of watching YouTube videos most of the day. Whether in the background or actually viewing them. Playing video games was also a problem and just casually roaming the internet on my laptop.
2) I have been a loner throughout college. I'm 23 now and never did anything in college regarding activities or making friends. I currently have no friends, except for some high school friends who I rarely talk to since we live far from each other.
3) I have had few interactions with girls, both intimately and platonic.
4) Constantly checking Instagram and Twitter for anything new. I have eliminated Instagram recently by the way.