In need of tips, advice, and support ! 18 year old my gf broke up with me because loss of erection

Hey how's it going guys I'm in need of some help!
I've been masturbating and watching porn almost daily I've been masturbating and watching porn since about 14 I'm 18 now. Most of the time I masturbate with porn if not in my head just think about someone attractive. Usually do it once a day atleast now.. for about 20 minutes. My porn addiction has gotten bad and regular porn just doesn't cut it I got into more extreme content. I always thought masturbation and watching porn would never be a problem but just recently I had intercourse with my girlfriend (first time having sex being sober) I get turned on when we make out and cuddle even by just looking at her body but as soon as we had intercourse I fully got soft.. its like if I didn't find her attractive at all but she is very.. just can't feel in the moment.. I told her and she thought I was gay and thought I had problems which made me really depressed. After this happened I thought to my self I had a serious health problem.. I've had sex 2 other times with different women but I was a bit drunk.. I felt the same with these women no plesure and a instant turn off as soon as I had intercourse with them after having sex with my girlfriend I knew something was going on I thought the reason I didn't feel anything from the other two girls is because maybe the alcohol had something to do with it? After all this happened I went and did some research and stumbled across NoFap! I was just wondering how long I would have to reboot for and if I could please get some advice and tips please. I just want to have a normal sex life and feel the amazing pleasure from sex everyone is talking about.. this is all very depressing for me it feels like if I'm not a normal living human.. I do live with anexity and depression. Please respond ! I'm willing and ready to commit to the reboot. If you need more information please feel free to ask . Thanks guys !

 

Thank you so much, willl do. I'm currently on day 3 so far. So far so good I'll get through this we all will !