The UGL is quiet on the higher floors. Likewise, the life science library in the main building is very quiet, especially in the stacks area located in the back. There are also libraries in Welch, RLM and various other buildings that offer more specialized information and quiet. The key to minimizing stress is to stay healthy. It is very easy to become distracted in college and lose track of yourself.
Most students leave their parents behind and are unsupervised, which is probably for the best.
However, it is a good idea to try to maintain a lifestyle that fits you. In other words, make time for yourself and keep habits that let you relax. If you are used to exercising then keep it up. If you like to read then make time for that. New pressures will arise in college and it is important for you to allow your brain a chance to feel comfortable.