I can't just be a friend of yours after our break up because I still love you.Hope there is one day you could really understand me.
注意：不能说是in love with you,因为按你的问题字面来理解是你还爱他,而不是你们两人还是相爱的.还有break up 可以用作名词,所以我说 our break up,如果用作动词,应该是过去式哦!所以,楼上有位仁兄应该翻译为：after we broke up.