You'll have to navigate through some unfamiliar territory today, but this should not be a very scary experience for you. You have solid footing in your life, and a good sense of where you want to go: but the same might not be able to be said of the people who are going along with you. They're in it for fun, and could distract you from getting serious stuff done. If you are wishy-washy about their involvement, then you have to let them know your concerns. Tell them to behave!