in year 12 everyone should be friends.
i mean it's your last year, at my school everyone is friends with each other, but there are exceptions who don't want friends.
hahaha lmaoo that in all schools. but i agree everyone should be friends. we've got less than 4 months to go after that you DONT HAVE to see anyone ever again. you can if you want with your closest mates/friends.
If you are an anti-social person, get PhD and enjoy your time studying, at least you will have a goal to work towards.
Otherwise, work out, run, fight, hunt animals, etc...
PhD is a better option in this case.