How can you tell somebody you dont love them anymore?

The truth always hurts, but it's best to be honest. You could say something like, "I care about you a lot, but I need some time to myself. There are things I want to see and do before I settle down." This isn't going to stop the hurt for her, but at least you will save her a bit of dignity when you leave. Thanks for being one of the good guys and caring about this woman's feelings because you could have just split and never gone back!