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How to stop loving a guy
Stop contacting your ex.
If he's always on your mind, it might be difficult to refrain from picking up the phone to call him. However, the longer you go without talking to him, the easier it will become with each passing day.
Try changing his name in your contacts list to something to remind you not to call, like " do not call! " better yet, you may consider deleting his number completely. Don't text him or send him emails, either.