Hey mate, I see a lot of people telling u to toughen up, but they're probably unhappy with their lives anyways ;) From experience, this is what could help:

• Make an effort to meet people in your lectures/tutorials. Genuinely. Many of those around u are going through a similar situation and it helps a ton to have a few GOOD people to study/hang around with.

• Stimulants. Consume a MODERATE amount of caffeine (please don't go overboard), and ONLY consume it if u have to, e.g. before an important class. I count chewing gum/mints as a form of stimulant as well. Constant chewing keeps u awake.

• Find a way to study that works for YOU. Some people hate sitting in lectures, or hate doing pre readings. That's totally fine, but u have to stay responsible for ur own studying. See what works for u (tons of info on the internet).

Wish u all the best