Whats the difference between dating and being together?

I am in high school so a teen answer would be helpful. I don’t know if i am together with my girlfriend or dating. A friend told me together is before dating but i think the opposite. Help me I am confused.

Answer
I’m not a teen, but I still find this confusing. The best way to find out is to talk to your girlfriend and figure out together what stage you’re at. Otherwise, you might decide on your own that you’re in one place, only to find out that she’s decided something else on her own.