It would depend on the conditions of your visa as to how long you could stay. I know that for Australian passport holders the answer would be yes you could stay that long, but rules differ for different nationalities. If you hold a Phillipines passport you would require a visa applying like the other person said. You would probably need to have four or five thousand dollars worth of available funds (when asked in the US) for the passport control staff to let you through without going out the back to an interview room. Even with a visa when you turn up you can be denied entry if you do not seem like a tourist so you d want to at least tell them you have easily enough to survive the length of time you want to be there. You d also want to have a return ticket (or proof of onward travel) as they will most likely check that and usually that is a requirement to be granted visas for most countries.
Thre is only one way to get a visa to the U.S. from the Philippines...see site below and follow directions there to apply for a B-2 tourist visa through the American embassy.