<human>: So it was my girlfriends birthday yesterday. She hosted a party in which she was really excited to show me off to her friends. I knew she had invited an ex to the party. So, when I saw her talking to this ex, I let my insecurities and jealousy get the best of me and I walked out. She was really upset and when I finally came back we ended up arguing on her birthday. We have never argued before. Her best friend doesn't like me now, and I realized that I screwed up big time. I really care about her and I want to make it work. What can I do to help her friend be more comfortable?
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Also, I was thinking of buying her flowers to help express my apologies but I don't know if that would come off too cliche.

Can you give me a shortened version of the text?
<bot>: made my girlfriend's birthday about me. Friend doesn't like me. I dont like myself right now. What should I do? Should I buy my girlfriend flowers?