How to fall out of love?

Ok, so I was with this girl from november until the start of april, she basically lived at my house with me and my friend from november until march before offically moving in when my mate moved out. we never went out as offical bf and gf but did everything couples do. anyways, late march i tell her i love her, she then stays in my bed from that time until we got kicked out for noise complaints. we had a falling out in april and now she doesnt talk to me. its been over a month now and nothing, i still love her but if she hasnt got the decency to talk to me i want to try and move on, this is where you come in.ive tried everything and still cant get her out my head, what can i do?!?!