It's fine if you aren't social and don't want to go out and drink all the time- you aren't alone. It's also cool if you don't have loads of friends on campus, most of mine travel in, but have one or two on campus so you aren't permanently alone.
Be prepared for people screaming outside your window at 3am on student nights.
Don't trust the uni food all the time- if it doesn't look right, don't eat it.
You will probably get fresher's flu, even if you do look after yourself well and have a good immune system. Germs spread very fast at uni.
The kitchen bins will never be emptied unless you make a rota or do them yourself all the time. Same with the washing up.