i heard some rubbing /grinding noise coming from my passenger side wheel. so i decided to take a look at it but nothing seems to be wrong. then when i shook the wheel, it moved back and forth, and it was squeaking. would i be needing a new wheel bearing?

 

do a search for it, if you don't know how, refer to the top in the frequently asked questions. I know there is a long discussion on this here somewhere. Hell, it might even be in the FAQ's. lol but it does sound like you need new bearings to me.