First time Travelling to USA?

I'm 18 and planning to travel to the USA for the first time this Summer. The only other person who will be with me will be my boyfriend. He's a US Citizen and is travelling here first, also for the first time on his own, before going back with me. However in all honesty I have no idea what I'm doing. I've applied for an ESTA (replacing the VISA Waiver for UK Citizens) and been accepted, but other than that I've no idea what I need/have to do/am doing. I desperately need some help with knowing what to do with VISAs and everything else to do with US Immigration and whatever. Please help!!
I'm only travelling there for a month as a holiday before I start Uni in September.

learn some spanish that should be useful.

i don't know what to say about that, but welcome to america! the best country ever! you're gonna looooove it! :)

Are you a student coming as part of a student exchange /study abroad program? If you are they can handle and answer all of your questions for you.

Be prepared. Immigration treats all aliens as aliens with two heads.

It's a amazing place to visit and there is so much to do!

UK citizens do not need visa to visit USA. other than that it'll be fine. no worries. they people are very kind, despot the wars.

You better meet with a person who has gone through it... Sit down and have them go over everything you will need.

USA is my favourite holiday, I have been to Arizona, Florida, California and Las Vegas you will love it.

If you want to study you can have a student visa or get 3 months at the airport when you travel outside USA i.e. Mexico which is nearby.

The easy way is to mary your USA boyfriend but after being sure that you lobe him.

sounds like you have a handle on it pretty much--you have a machine readable passport, right? You have the immigration thing taken care of (see the link).

So....get yourself a ticket!