When my amp is on high gain or just has distortion there is some buzzing and feedback. I can tell it's the amp because it happens when the guitar isn't even plugged in. I know it's normal for the amp, though.
It's a 65 Watt crate

I ordered a Boss NS-2 Noise Suppressor, will this fix my problem?
Yes it will........it's one of Bosses better pedals. And yes there are better pedals out there but for te $$ its not bad.
If you have a $hitload of noise yeah it will........find a better pedal. if it's not alot of noise you'll be fine.