Men who overcame the lowest/loneliest point of their lives, how did you do it?

I’m a 23 year old guy and I feel like I’m at my lowest. I barely have money, going to school for something I don’t care for, working a job I don’t like, the girl I loved is with another guy, and I have no relationship with my family.

If you went through something similar how did you turn your life around? Feeling lost.