People who had to leave someone they loved... how did you get through it?

I was with my boyfriend for almost 2 years, and we recently broke up.

The problem wasn't cheating or abuse or anything like that. His parents didn't want him to get married yet, and I realized I couldn't keep waiting for something that might never happen.

I know moving on is probably the right decision, but it honestly feels impossible right now. This was someone I pictured my future with, and now I have to let go because of circumstances neither of us could change.

For people who've gone through something similar, how did you actually move on? What helped? And how long did it take before you stopped thinking about them every day?