If you're talking about me behind my back that just means my life is obviously more interesting than yours(yours是不是漏掉了?）
If 引导条件从句 If you're talking about me behind my back如果你们是在我背后讨论我的话,
that just means my life is obviously more interesting than yours 另一个句子了,应该用逗号和前面的条件从句隔开. that就是指代前面的条件从句,在这个句子里做主语,means是宾语
my life is obviously more interesting than yours 是宾语从句.

整句翻译就是：那意味着我的生活很明显是比你的有趣多了.


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