hi shazabela, you are wrong, it has been asked a million and one times :)
anyway, you need to do an esta form in advance now and send it off to them (since jan) you can do it online, but has to be done at least 3 days b4 you go, giving more time for investigations i suppose, so its not just a case of filling in the green form on a plane. As you are aware, your b/f is ineligible to travel under visa waiver anyway, and should in theory apply for a visa. It's really up to you if you want to face him being immediately deported at his own expense and you faced with the choice of carrying on without him or going back too. no one can tell you categorically if it will be ok or not.
Anyway, if its for a holiday, avoid the stress and go somewhere else. There are much nicer places!