Well, this is more of your personal decision here, Kopa. It sounds like these lessons are optional and if they are, then it's up to you whether if you wanna go to these lessons for summer. In regards to your best friend, if you still want to see them and remain in contact, pick what you want that will get you through in life. Also, if your best friend has a computer or some mobile device, e'mailing them or calling them may ease your unsocial activity.
Overall, friends are essential in life.
