Basically, I blew off a female friend of mine (We were supposed to go to <insert local huge university here> to party) to have dinner with my GF's parents (birthday for her mom) and a rugby game earlier in the day. I gave her about 5 days notice that I couldn't make it this weekend. That's the background.

This was over a week ago and my friend is still pissed. I texted her today asking her to come to my rugby game and she sent 2 texts back confirming she's still bitchy. I replied with the ignore, "Ok." My question is what do I do about platonic female friends? We have a short history where we went on a few dates and hooked up, but that was almost 3 years ago. Should I let it chill for a few days then contact her again? I don't want to lose her as a friend because even as a woman she's been a good friend to me.