If you are really a true lover, then you can't move on. Suppose under some circumstances you have moved on and remove each and every memory of her/his from your life, so that you wouldn't miss her/him. But what will happen when she/he herself/himself comes and start talking to you? I mean friendship! Is it possible to control yourself for feeling for her/him? And in negative scenario, can you forgive the mistakes she/he done, due to which you relationship ends. No. Right? you can't. And if You can, it means you are forgiving for the reason which broke your relationship but at the same time you are again started loving her/him. It's really really hard. You really should have that guts to control yourself.