How do you get completely over someone you love when they do not feel the same way?

Try to forget him/her and distract yourself. Spend time with your same-sex friends, watch TV or movies, read books. Under no circumstance have contact with him/her. That means no texts, no face-to-face contact, no email, no social networking, nothing. If you're close friends, just avoid him/her. Next, try to find someone else, not necessarily to replace them, but just so you can have feelings for someone else. Don't have a one-time fling, however.