Maybe you should just tell them that you're not ready to talk about it because it's too painful. That maybe after a few months you'll be able to discuss it. In the meantime, you just want to move on. The best support you need now is to GAL, have some fun with your friends, and not discuss it at length. The friends you have told might be a good resource if you need to get something off your chest quickly. When I was going through my sitch, I designated three friends to talk to, so that they didn't feel everything was being dumped onto just the one person, and constantly being phoned, etc. It worked very well. They have to be really good friends though.
Three weeks is still quite a while. Start thinking about it a week before. For now, just go out and do stuff, or read, or do your hobbies, or whatever you find is fun.
Me:57 H:52 M:28 Got another lawyer last year and filed. D35,S/D twins28,D22 EA4/04 End? Who knows? "Life is like a mirror. Smile at it and it smiles back at you." — Peace Pilgrim