none of that. everyone just keeps to themselves.
It's quite normal. Everyone thinks of themselves first. It's not a lack of respect. You take it as indifference, but it's not haughty indifference. It's simply a healthy way to view relationships. People won't be interested in you if you don't give them a reason to be. Unlike women who get attention simply because they are born female (I wouldn't want to be in their shoes, it must be hard to live with).
In brief, you have to give if you want to receive. And give without expecting anything in return, which is the opposite of what your anxiety tells you (I'm not good enough, I'm going to be rejected, no one is interested in me).
You say you talk to girls, but again, is it the right time? How was your homework someone I don't know who asks me this question I have no reason to give them personal information about myself.
Beyond that, women are very good at sensing interest behind an apparently innocent phrase like "how was your day". He doesn't care about how my day was or who I am, he just feels lonely and unhappy deep down.
Finally, if you think that nofap will solve your anxiety issues that you've probably had for years, you're mistaken. No magic solution and certainly not something as silly as stopping masturbation can solve buried traumas and a lack of self-love, and certainly not in 70 days. Only persistence and a insane desire to get out of it and make every effort to take care of oneself, love others, love oneself can do it. And it takes years. Not 70 days!
As for your school, I'm like you, I don't really have close friends in my school, but I do sports, I go out a lot to bars, I'm enrolled in theater classes so I have a lot of friends. Real friends. And believe me, getting out of anxiety alone works up to a certain point. Then you need friends who remind you that you can accept yourself and be 100% yourself. The myth of going through life alone is sad and devoid of truth. That doesn't exist. The truth is you need others. And the only way is gradual exposure.
I remember 3 years ago just going out of my house in the city around a lot of people without talking to anyone because the anxiety was gnawing at me from the inside at the mere presence of people around me. A few months later I took my first singing lesson. Today I still have anxiety but it no longer negatively affects my life and my self-esteem. Progress is possible.