Honestly if you only have three semesters to go, I would suggest just finishing and making the best of it. If you struggle with depression this probably won’t help but attitude really is everything. Maybe you can work with a counselor on some strategies to help you approach each day, month, semester in a positive way?
If you have a small group of friends cherish and enjoy them. The day will come when you won’t be able to see them everyday and you’ll wish you could.
My other advice is to start each day with gratitude. Be mindful of all in your life to be grateful for (friends, safety, education, family, etc.) and truly be thankful. My father always said, “If you start feeling sorry for yourself just look around at others. You won’t have to look very far to realize you have nothing to complain about.”
Good luck.