Emotionally crisis during rebootin

Hello everyone, i was trying to nofap from 3 years, but i failed and failed, it was really hard and painful, my longest streaks lasted maximum 2 weeks, it was hard time in my life, there were a lot of problems in my life, i was weak, sad, low self-esteem, but after hundreads of failures i found that strengh and now i am on something like 40 days on nofap, i am proud of myself because its my longest streak, and its first time i really belive that is possible, in short period of time i became really better version of myself, better social life, exercises, diet, habits, more energy, motivation, positive thinking, my self-esteem and confidence is on the highest point in my life, but i ve got crisis today and i have to talk to someone, there is a girl, which i could call my crush from 3 years, we ve got some periods when we were closer during this time, but there was always something wrong, probably of my addiction. And thats the main reason of my crisis. It was few days ago, I proposed her meeting but she refused. It made me feel sad, but i thought that i am growing now and i can't ruin that and i started feeling quite okay again, but few days later i was on the party with my friends, she also was there, but i didnt try to look for her atention because i thought thats okay and normal that someone is not currently interested in you, but she started to flirt with my near friend i didnt notice that, but he told me that and that he started thinking about her. It hurt me, really. Because I didn't have time to forget about her and he's my near friend. Why she did it to me when she knows that i am still thinking about her? It made me feel sad and angry. And my self-worth diminished cause i started thinking "why she started flirting with my friend if we had a closer bond some time ago, is he better than me?" i will not masturbate, but its my first big self-worth crisis during nofap.