How do I find the girl I fell in love with after knowing for only 7 hours?

First off, saying you're in love with someone is a really big thing… to me being able to say someone is in love is being able to ssay that you don't only fancy them more then any1 else, its also being able to say you care for them more then you can describe, you always want to be with them and help them, and no matter what happens you just want them to be happy and nothing else matters… although that's just my opinion

If you really really like this girl you should try to talk to someone who knows her and ask if they could give you her number, or at least ask if they can give her your phone number so she can get in contact with you.

You should tell you're friend that's trying to cause trouble that you'd apreciate it if she didn't do that because if she really wants to be a good friend of yours she shouldn't try to make things difficult for you. Similarly try to see things from her point of view, and be simpathetic to her feelings towards you.

Whatever happens, best of luck to ya!