講解
Today's key words are ex-girlfriend and ex-boyfriend!
ex-girlfriend and ex-boyfriend
前女友 前男友

Ex-girlfriend is the girl you dated, but no longer has romantic relationship with.

Here is an example:

My ex-boyfriend is a nice guy, but we just don't have that chemistry.
我的前男友是個好人，只是我們兩個缺少點火花。

今天我們就來講講前任，如果你的前任要結婚了，要不要去參加Ta的婚禮呢？

Should you go to your ex's wedding? It is debatable, so let's talk!

For those who will go to their ex's wedding:
Why not?
If your ex-boyfriend or girlfriend invites you to his or her wedding, you definitely should say yes!
But there are different tips.

If you still see him as a friend, just go to the wedding as a friend.
如果你倆還是朋友的話，去參加朋友的婚禮很正常啊，送去你的祝福，還能在婚禮上跟好久不見的其他朋友聊聊天。

But if you just hate him, you should go to the wedding as well. Put on your most sexy beautiful outfit, bring you brightest smile with you.

不要怕別人所謂的閑言碎語，Be yourself。前任的婚禮是證明自己沒有他過的也很好的一個非常好的機會！

But for those who don't want to attend ex's wedding.

If somebody tells you that you can still be friend with your ex. He is lying!
No one can be friend with their ex, no one!
跟前任還是好朋友？別開玩笑了！

You were in love with her or him, but both of you have to move on.
分手即為陌路人，可能過了幾年偶爾還會見到，到時候打個招呼，問個好就足夠了。不必糾纏。

So there is no reason to go to the wedding if you two are no longer friend. Right?

And think about it, if you are there in the wedding ceremony, your mutual friends will definitely ask you about your feelings. It is annoying!