I'm not a returning student, but I went through a program called "distance ed" for two years, in which most of my classmates were returning students. I LOVED them! I miss them!
My advice to you- don't be afraid to reach out to the younger students. Sometimes the returning students hide in the back of the classroom and don't interact. Sometimes they talk to the rest of us, and find that we all have more in common than maybe we would have thought.
Some of my very favoritist friends from school have been 20+ older than me. We've been able to help eachother get through, and I TREASURE their friendships.
If you can get classmates that you're friendly with, school becomes so much easier. Even if you never "hang out" outside of class, they can help you with studying, and you can help them. I love to do have a friend in each class that will help me out.
Angela