If you want to forget your ex.Enrich your personal life through work, hobbies, and spending time with friends. If you keep yourself too busy to dwell on it, time will help you forget.もしあなたが別れた恋人を忘れられないなら、私生活を充実させると良いかと思います。今は苦しくても思い出す暇もなく過ごしていれば時間が忘れさせてくれるはずですよ。
you can't,there is always time that you will remember your ex,even if you forget about them, memories never fades,but feelings changes