1.There is something we have to learn to give up.Only without reluctance to move on can we embrace a bright future.
2.I didn't mean to ignore you,I was just trying my best to forget you.So,please try to leave me behind.
3.I don't know how much courage I need to say goodbye to you,my unforgettable lover.第三个不要这样翻译 不是我的情侣 换一下。谢谢 好的话就是你了那就换成beloved，表示她/他是你“心爱的人”或者”亲爱的朋友“。如果你还觉得程度太深了，就用最普通的 girl/boy代替。