There are different reasons students have to work during the summer and, if you aren't doing something you really like, it can be terrible. Here's some great things to make you feel better about having a summer job!
1. You're out of the house and socializing.
Just how long have you been waiting for it to be summer? Don't let it be just a time where you stay indoors 24/7 and not gain anything that improves you as a person. Summer jobs give you the opportunity to go out regularly where you have the chance of meeting someone new and/or learning something new.
2. You have a sense of purpose.
If you're working now, it most likely means you have a goal. You know what is ahead of you and you know what you can do to get there and that's great! Some people are working to pay tuition, some want to gain experience in their career fields -- whatever it is, be proud of yourself for going out to achieve the goals you've set.
3. You feel more productive.
At least somewhat. Alongside feeling purposeful, you will also feel productive because your days are maximized and the satisfaction of working hard can never get old.
"Doing something that is productive is a great way to alleviate emotional stress. Get your mind doing something that is productive." - Ziggy Marley
4. You're making that cheese (duh).
When working at the worst places on earth to deal with people like retail and fast food, the biggest motivation is the money. The consolation I have for you is everyone dies eventually and after summer, you can finally buy whatever it is you've been saving for!
Bonus: even if you don't have a job, there are tons of things you can do to feel good (instead of guilty, which is the case most times) about the time that's passing. You can read a book, groom yourself, start a blog, and read another book.