Ok so I went out a few nights ago and I approached a cute blond by herself. I went up and I said "what's up? How's your night going?" In a pretty nasty tone that turned me off, she says "good. I'm just waiting for my boyfriend to come back"

From past experience, I know that pushing it doesn't really work out that well for me because I feel if she was genuinely interested she would let a small convo side. What do you guys say to duck? I wanted to be like "oh ok cool it was nice meeting you"