I'm 24 now, but even thoughout my teens I was never much of a drinker. The odd here and there on special occasions.
I decided back in March to go teetotal, and completely abstain from alcohol.
Now I'm not suggesting that's for everyone, but alcohol can contain a lot of calories - and the mixers can be packed with sugar.
Have a think about your habits when it comes to alcohol, maybe there's something you can adjust or cut down on. Like food, it should be enjoyed in moderation.
Stay healthy all <3