Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: This situation won't make sense without some background information. I've been with my girlfriend for about 5 years, and we've never had many issues. Ever since I met her, another guy, we will call him X, has been around her and was previously interested in her. Cool, fine, people have past interests and that's not a big deal. The problem arises with what happened after we were already together. X continued to make romantic advances when they were out together as "friends", and it made my girlfriend uncomfortable. X also has some anger control issues and has attempted to become somewhat violent with her, and has additionally tried to spread a rumor and convince my girlfriend that I was being mentally abusive towards her (she didn't fall for that, thankfully). This all happened during high school, and since we've all gone to university they stopped talking for the most part. Though they aren't much of friends anymore, my girlfriend has become friends with X's current girlfriend. My girlfriend has invited both of them to her Christmas party, despite me saying for years that I don't want to be in any situations around X. I'm not one to let my emotions get the better of me usually, but I'm worried that I'll become confrontational due to the past with X, even if he doesn't do anything now. So, AITA for not wanting to go to this party/not wanting him to be there? 

not wanting to go to my girlfriend's Christmas party