而且她爱著另外一个人.她心跳得更快.但她不知道那个人是否喜欢她.不要再开第二次玩笑.你还记得你一个月前告诉我的话吗?
PS 你的句子有语法错误,顺便纠正一下：
And there is another person who she loves.
Her heart beats more quickly.But she doesn't know if the person likes her.
Don't let the joke start twice.Do you remember something you told me one month ago?
你的标题也需纠错：If you really fall love for her, please give her safety and happiness.
如果你真的爱她,请给予她安全感和幸福.