Falling out of love is far harder than falling into it. The best you can do is turn your attention to something else, not someone else. Rebounds or distractions are the worst kind of thing you want, because it will be full of comparisons and hidden agendas. Not a good thing in a relationship.Take up a new hobby or simply do something for yourself. The heart can't always get what it wants, but your head can turn away from the prospect of unrequited love. It will take time. A lot of it. But eventually, slowly, very much so, you'll be able to break away from the hold he has on your heart.I wish you all the best. Good luck.