<human>: A little more background. My ex broke up with me about 6 months ago. We were together for 4 1/2 years. It was a wonderful relationship until she went to study in Portugal for a year. After she came back everything just didn't work out anymore and we broke up. It was a mutual breakup but it still hurt me so, so much.

Well, she studies in a different city and I was doing great. Until last week. We went to school together and come from the same town...We had a small class reunion and I knew she was gonna be there and I thought it wouldn't be a problem. Oh how wrong I was. I saw her at the reunion and made some smalltalk...and just like that I was back to square one...madly in love. After that she starting sending me textmessages...and I thought that maybe she feels the same. So I called her and asked about her feelings. She has no more feelings for me. She is actually seeing a new guy and thinks that the breakup was the right thing to do.

Right in the feels...So, new years is coming up and we are supposed to go to the same party. But right now I feel like I couldn't handle it and I don't want to cause a scene of some sort when I get drunk. The thought of seeing her with some other guy makes me nauseous.

What's my move here, Reddit? What would you do? Would you go to the party? Or find something else to do and try avoid her?

Can you give me a shortened version of the text?
<bot>: Though I was over ex of 6 months. I was wrong. Very wrong. New years party is coming up. She will be there. Go or not go.