<human>: Can you condense the text into a few key points?

Ok, here's the back story first. I have an American soon-to-be room mate of mine at university here in the UK.
He invited me to go stay with him and his family for 6 weeks over the summer up in WA and well, he told me to fill in an electronic form for an application for the American Visa Waiver Program. I filled the form in, and it then said I was a part of the database.  

I'm still worried that it perhaps hasn't gone through, because it seemed almost too short. Granted it did ask rather penetrating questions and that it was on the correct site. 

I just am asking for any advice from people living in the US with any advice of what I should do, or advice from people who have also used this visa waiver program. 

The site I used was here: 

All help would be greatly appreciated.
Thanks
<bot>: I'm worried that my visa waiver hasn't gone through for going to the US for 6 weeks, and that they will turn me away.