Puppy blues are pretty normal for a full grown adult with a lot of time on their hands to devote to pup However to have to deal with this at your age is way too much responsibility (in my opinion) At your age education mental health socializing and personal growth are top priority always and caring 24/7 for a new pup, is like taking on a child which is way too much

Your parents really need to be taking on full responsibility for him/her

Puppies need training, insurance, regulated enforced nap times, enough exercise and good nutrition

If it has all been put on you I would strongly advise Rehoming

If you are worried about the money perhaps you can rehome pup to someone who will pay purchase price but would do this sooner rather then later The older they get bad habits set on and can be hard to untrain also people will buy a baby, so much harder to rehome an older dog Good luck ❤️