Help, I'm a student who doesn't like drinking and I'm under so much pressure to binge drink!?

I'm in my final year and am doing better than I expected, so I really don't wanna let grades slip, but since its my last ever term I've found ppl I know are going mental and expect me to go out every single night and get wasted, and I really don't want to! I've been told by the doc to lose weight so I don't wanna drink, plus I don't really like alcohol anyway. I dont mind going to the pub for a quiet night but ppl here just wanna get dressed up and go to a club and get off with any bloke which really isn't my thing. Also coming home at 2am isn't good enough, a 'proper' night out for most students at my uni lasts until at least 5am and I'm someone who loves sleeping and also who actually wants to go to all my lecturers so I do well in my degree! Whenever we do something non-clubby, like going to the cinema/going to a gig, as soon as we get out the 1st question is 'where are we going now?' whereas I don’t see the problem with going home at midnight and not being drunk, but everyone else