I need your help

I started nofap journey April last year, it has been a year and a half. my first half of the journey was good. I manages to go 140 days without PMO once. I was very proud. I experience the benefits. However, after I relapsed on day 140, I have not been able to keep the streak up again. The reason I was able to get the streak so high was because I was just broken up with. So something pushes me to just keep going. I felt like I want to become better. Proving her wrong. After awhile that motivation sort of fade away. I will go 7-10 days and then I will relapse. I notice that everytime I relapse, it is always when I am mentally tired. My goal is to go 180 days no PMO. But I am having a little difficulty getting pass 7-10 days mark Any advice to how I can approach this.