How to stop loving someone?

I've been in a similar situation. Circumstance ended up taking us in different directions. (I was in high school and they went to college.) We haven't seen each other in over a year, other than briefly crossing paths one time. Coincidentally, I happen to be starting at the same college in about a week and a half, but, since they've been gone, I've gotten over it and feel pretty confident I'll never fall back into it. Basically, you may have to just cut this person out of your life for a while- a long while. You may have to do what I did and make a conscious effort not to think about them. When I ran into them, I even made it a point not to even acknowledge their existence when I talked to someone two feet away from them. I felt like a jerk for it later, but it was what I had to do.

Talk to your friends, tell them you want set up with someone. In some cases when a relationship first starts you maybe don't even love the person but as you get to know them you start to grow to love them.

You try to not spend time around that person, and focus your energy on something else. Zach's answer is pretty much spot on. You have to try and push them out of your mind. Give yourself space from that person.

Get a hobby