Here's some information for you. Your chick may do better with company. However, you will need to keep it warm, dry, well ventilated, and feed a good quality chick starter. Otherwise your lone chick my die within 24 hours.
What are you using for a heat source? You must keep it at 90* for at least the first few days. A chick without adequate heat will die a slow death. And giving it a blanket or other covering to snuggle up in will not suffice. Chicks can't produce enough heat to survive until they are feathered out.