Hey buddy, I was in the same boat (20 and in full time education).
I lost a lot of 'friends' and I use quotation marks because my real friends stuck by me throughout the whole situation and visited me at home when i was too nervous to go out. The people that don't support you are not worth your time, your better off getting rid of them.
One day you'll appreciate everything you've been through because you'll have a group of friends and you'll love each of them. I had a big social circle when I was a drinker and I thought I had roughly two close friends. After everything I've been through I've landed a small circle and I know each of them would support me through anything now, without a doubt. Congratulations on recognising your problem and please don't let social pressure mould who you are.
Best wishes
~ENC