How do I stop caring?

My ex dumped me about almost 5 months ago now. We dated for about a year and a half. I have been broken over her. I was in a relationship for 8 years and the pain I feel over this relationship compared to that one is unreal. I think about her first thing in the morning. I think about her throughout the day and I have trouble getting to sleep over this girl. I've done some pretty crazy shit to get over her. I've tried things I thought I never would just to break the cycle of thought and try and spark a new thought pattern. I don't know what to do. Every time I hear a song, see a picture, item or anything that reminds me of her I just spiral. I'm in a transition right now having to get settled in a new job, new place and new area. I fall apart at least once a day thinking about how fucked up my life is now compared to when we were together and trying to build a future. I don't know what I want for my career, my finances are shit, my mental health is shit, I barely want to get up most days. I was trying to workout and make friends in the beginning, but I've lost some momentum and am in this slump again. What do I do? All I want to do is reach out.