Never try to posses her if you really love her.Only in this way will you never lose her.
如果你真正爱她,就永远不要想尽一切办法去占有她.只有如此,你才能和她永不分离.
注意：Only 置于句首的复合句,后面的句子应该采用部分倒装形式——助动词do ,can,will等置于主语前.never lose her.永不失去她=和她永不分离.