My (23M) ex's (23F) wedding it 3 months away....and she contacted me. What to do?

My ex (Katie) and I dated for 2 years before she left me for another guy. She broke my heart and I moved away. I haven't talked to her in nearly 2 years. I'm now in a great relationship and I'm happy and well on my way to becoming a doctor. <br><br>And then Katie contacted me. She messaged me on Facebook apologizing about how she treats me and asked if we could meet. This went on for a couple of days and I was confused as to why she wanted to meet. She said she wanted to make amends....but I suspect she wants more. She wants to meet for coffee and catch up. <br><br>There's a part of me that wants to meet her and rub my successes in her face. But there's a bigger part that wants nothing to do with her. I'm in a great relationship now....and my GF has supported me for the past 2 years and been my rock. <br><br>What should I do?<br><br>**TL;DR:** Katie (23F) left me (23M) for another man 2 years ago. Now she's engaged and wants to meet up with me. What to do?<br><br>**EDIT:** Thank you everyone for the advice and support. I've decided not to respond. I finally feel some peace around the whole situation. I'm going to share this with my GF tonight and put all my attention into her.