Pink, Divorce to normal couples means going their separate ways and possibly not having a whole lot to do w/each other except for dealing w/the children, etc.
In the MLC world, many of them want a divorce and yet, they truly do not understand that divorce means the end of a relationship and people go their separate ways. To them, it's just something that sets them free to do whatever they want and unfortunately, many of them do like to keep the contact going because they can't let go and when the former spouse moves on they do everything in their power to keep the connection going. (Like in your case w/all of the texting by your former spouse.) He wants your attention and to remind you that he's out there.
Pink, you are under no obligation to respond to all of his texts. You have the control here and if you think the texts aren't worth responding to, then don't respond. I do think your response to his text was excellent. After all, you are a busy woman and unless the texts are an emergency, you don't need to drop what you are doing to respond to him.
Don't allow him to bring you down. Continue as you have been and enjoy the game and party on Sunday. I think you doing great!
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.