30 Day no Contact Rule??? My Ex Showed Up at my House at 5am?!?

Has anyone ever tried the 30 day no contact rule and had success with it?

For those of you who dont know what it is it is completely ignoring your ex for 30 days after breaking up and its supposed to leave you on better grounds to getting back together by going completely absent from their lives.

Me and my recent ex have been dating for 3 years and he recently broke it off with me when he was on a 3 week vacation in his home country bc his parents dont like the fact that im not from their culture. I told him i didnt want to see him unless he wanted to be together. He called me the day he came back and saw me then to break it off with me again two days later. He wanted to remain friends bc we had always been really close and saw eachother every single day for the past 3 years and at first i said no then gave it bc i just missed him and wanted him so terribly. So he would come over and we would talk and joke and basically act the same exact way as when we were together except it everything was always on his terms. We could only have a convo when he wanted to, or be close when he wanted to. Nothing was mutual. But i just so badly wanted to be close to him again. Anyway, one day he was over and we had gone to a movie and then back to my house but the whole night it was as if i was by myself. He had no interest in talking to me or even acknowledging i was there. I just wanted his attention so badly i started to cry and he told me he was acting this way towards me so i would leave him and it was the "only way i would be happy". He left right after saying that and thats when i had enough. I didnt message or call him since that day (5 days ago). So he messaged me saying "this is only hard on me i guess" and then called me 7 times from 3 am to 430 am and i ignored everyone. I was sleeping! So then he shows up at my house at 5am! I go to the door and am like what are you doing here?? And he said he missed me and wanted a hug. I said ARE YOU F-ing DRUNK??? And he said no and he was dressed to the 9s. I didn't ask where he was bc frankly i stopped caring. He said he wanted to talk and be friends still but still doesnt want anything more. I just stood their and shook my headl. I dont remember how the rest of the convo went bc i was basically half asleep but he left all bummed and i went back to sleep. Then he messaged me at 4 pm today saying "sorry i woke you up in the morning. It was rude" and i didnt message him back.

I care about him still but all my feeling towards him feel surpressed. I dont want to hold onto something thats not going to work, theres no point. I cant force him to be with me and im done being his doormat. In the meantime ive been working on myself as a person and staying busy with my new job school and just recently started doing an old hobby i used to love. I was just wondering if anyone has ever had any success with this 30 day technique??