Quitting PMO

I am a porn addict, like many others who are reading this thread. Actually, I stopped watching it for 2 years, from when I was 15 until 17, and now I relapsed for almost a year. Last year, I have been watching it once or twice a week, I felt I wasted a lot of time...but the impulse is difficult to resist when I can't talk to anyone about it. I have searched up many YouTube videos and websites on quitting porn, I tried and failed so many times...
I'm an overall B+ student who is working hard on academics to get into university with a beautiful score next year, but my porn addiction often messes up my study plan...I know a lot of us tend to wake up late because we watch it at night, but last week, I have been waking up at 6 AM and I went running every morning to get energized. When I finish my day from school and work, which is when I'm tired already, I cook for myself and do the dishes, then I do a bit of study, and then the impulse came...and I wasn't able to sleep until 1 AM...the second day, I woke up at 9 AM, and that day was a mess. Days like these often happens once a week, and I don't have others to talk to about this issue...
Porn deteriorates my fitness level as well. I find it harder to sprint 240M*5 than I used to a few months ago, maybe because I had sore legs or because I haven't been training as much recently, but porn definitely served a portion to my deteriorating fitness level.
As for social interaction, I don't find it extremely difficult to talk to the girls around me, but I often got shy and wanted to avoid talking to the good-looking ones, or the popular girls, which are quite attractive from my perspective...most girls I liked, or have interested in all saw me as just another guy or merely a friend, and they all have many male friends... I was rejected when I asked a good-looking girl to go to the prom with me, a few months ago...and I didn't go to my last prom. Well, I'm not ugly though...I'm just a bit off from 6 ft, I do weekly callisthenics and play rugby, I'm a debater, regional speech finalist, a guitarist. I teach swimming to kids. Maybe because I'm Chinese and the European girls are just not into Asian guys, who knows...
On the other hand, I go to church every week, I do have good friends in the church but I don't consider myself to be involved in the religion as much. The reason I still go to the church is that I have good friends there who have a positive influence on me so that I won't be thinking about anything related to 'PMO' when I'm in their presence.
Hopefully, I will receive some helpful comments from you under my first thread, and I hope you guys will encourage me to go on this 'Nofap' journey.