Lincoln Park is fantastic! You want to leave Lincoln Park and DePaul for Champaign-Urbana?!
Look, DePaul is a good school. It’s not as prestigious as UIUC, but you were not happy there. You may be just reacting to others’ reactions when you tell them you willingly left a prestigious (in Illinois, anyway) school. Forget them. This is your life and your education. Get to work on making DePaul your new home. Don’t look back, and keep going forward.
You will get a fine education at DePaul. I personally know people who did.
Go take a walk this fall in Lincoln Park and near the lakeshore, then try to remember what it was you missed about Champaign-Urbana. That’s right - nothing! 
Best of luck to you. Chin up, and move forward!