Congratulations and it's good to be cautious and not complacent.
I think the best way to deal with the situation is to plan, plan and plan. You know in your heart whether you are ready to spend time with old friends or not. Maybe you will be in a week or a month, but you will know. If you are afraid you will get caught up in the moment, don't go. And, yes that's hard but sometimes we have to make major changes in our lives. The fact that you are concerned and looking ahead will help you.