i cant see the option for FXAA.. i noticed while playing FF X-2 when i full screen it during battle encounters is somewhat blurry on some point.. well i know it blurs on some instance but when the character idles during play im noticing it is it normal? and i tried playing my NBA streets 2 and its hella lagging D: might be a difference in game?

fxaa can be toggled with pgup key....
did you enable msaa? If so then try disabling it for your ffx problem...

where do i toggle it? from the game itself or from the PCSX2?

Simply press PgUp key on your keyboard when playing to enable FXAA...