What would you guys have done?

A girl was chilling with a guy really close, leaning into her. I opened the guy first by tapping him on the shoulder and asking him if he has ever heard of X (basketball player name). He said no, but sounds familiar. I followed up with saying that he looks just like him. He started laughing, and I took advantage of that to make the group a three way conversation. For the first 2 minutes, I was just talking to the guy, completely ignoring the girl. I could sense the girl was just standing there looking at us. Me and the guy hit it off, and then I opened the girl. I had heard her name only once before so I told her that and she was surprised because she thought her name was unique. I told her about the other girl's cultural heritage, etc.. and it didn't match with hers. I changed the subject quickly and asked both of them how they know each other and what brings them to the venue; they were celebrating the girl I just opened. That was the perfect queue to learn about what the celebration is about and learn more about the girl (adopting kasabi's "YOU" mentality) and find connections in our lives. I prefaced my question with: "I know you are probably tired of talking about this, but I have to ask -- what is the celebration about?" so it didn't sound cliche and showed that I cared about her feelings a little bit. She said she was leaving for Africa tomorrow for 1.5 years, and I was taken aback a little bit but not cuz I had no chance with her logistically but rather because that is a genuinely interesting story. I learned about her current job, her transition, why she was changing. I asked her whether she likes her job right now and she said "no". I gave her a high-five for being honest and told her I ask other people with that job the same question and they sound miserable but they pretend to like it. We started talking about why people pretend to do things in general and I found that direction of conversation to be something deep. I liked where it was going. Then, boom, out of nowhere, one of her close guy friends interrupts the whole convo and grabs all her attention by saying "we are going to miss you, etc… some sappy shit." He introduces himself to me by saying something douche-y to me (probably cuz he was a little drunk) and I ask the group: "Is he always this douche-y?" Not sure if I should have said that in retrospect. I genuinely wasn't phased by his interruption cuz I knew the girl was going away to Africa and I had no chance with her. He said sorry when I asked the question; but I responded with "its all good, you have every right to hug your friend goodbye. I just met her. You know her for years and she is going away tomorrow!" Maybe I was being too nice with that? I was happy with the recovery, but she was totally just talking to him now and I just told her good luck in the next chapter of her life and left, thinking there was no point to stick around.