How do you move on from someone when everything in your life reminds you of them?

Letting go is like pulling a tooth. When it was pulled out, you were relieved, but how many times does your tongue run itself over the spot where the tooth was? Probably a hundred times a day. Just because it wasn't hurting you doesn't mean you didn't notice it. It leaves a gap and sometimes you see yourself missing it terribly. It's going to take a while, but it takes time. Should you have kept the tooth? No, because it was causing you too much pain. Therefore, move on and let go.