Any apology followed by the word 'but' is not an apology, but an excuse, and will not be accepted. "I'm sorry I threw that childish tantrum and made you clean up all that glass, but my boyfriend totally deserved it." That's offensive to me, really.
When there is a line at the bar, do not try to be sneaky and start your own line. Accept your fate and que up. Make up your mind while you're waiting, not when you get to the front.
I'm not ignoring you. I'm thinking about you so much that I can't bear to talk to you.