Hey hey, firstly may I say CONGRATS on being sober. You should feel totally chuffed
Secondly, please don't start drinking again in order to "fit in" or "be more fun".
You know you can't be a normal drinker, and trust me when I say that drinking does not make you more fun or more popular with your mates. It leads to a world of anxiety, angst, shame, disgust and in all probability you will eventually lose the ones you love (even if temporarily) and you will lose yourself.
I drink thinking I will be boring if I stopped... It's a stupid way to think. I wish I could say I was clean and sober
Maybe you need to buckle down and do your final year getting awesome exam results rather than worry about the frat parties.
Whatever you do, stay on the clean and sober path and be proud of it
xx