You have gotten good advice here. Learn ways to relax. Go for a walk, do some yoga, or something fun and relaxing.
You will feel healthy and less toxic which will allow to you better focus on your goals and keep you away from negative thoughts and distractions. Focus your mind on getting back to school for the Fall semester and prepare for it. Once you are in school do well and find activities that are enjoyable and make the most of your time at school.