I'm a guy & I can Easily belt C6 but Can't go below G2.?

First off, do not be deceived by your speaking voice, although it is usually the case that the speaking voice represents the singing voice it is not always. Do you notice that when you laugh you probably laugh in a much higher register. If you feel comfortable singing higher then you should pursue being a tenor, just because your friend can sing bass does not mean that you can instantly decide to switch. If you have gone through puberty then your voice is the result of the changes within your body and you should not feel forced to sing low if it is uncomfortable. At this point you really need to be careful with your voice, it sounds like you are approaching your high notes with a lot of tension and unless you are a trained singer you should not be belting your way up there. It might be good to sort of hit the reset button a bit and figure out where your voice lies. A tenor's voice lives somewhere around C (a low C for a guy, middle C) to a high C with proper training. A high school tenor tops out at the F below that high C before they have to switch into falsetto. Your chest voice covers the entire range of your lowest note to all the way up to you simply cannot sing higher before transitioning to either falsetto (a light pure sound) or going into passagio (which is a fancy italian word meaning basically a transition). When you listen to Pavarotti he never sings in his falsetto, he stays in his passagio which is a tucked under feeling that you will discover if you continue singing through high school and into college. I know I'm rambling, but, please do not feel pressured to sing bass, your voice has a natural and healthy position, if you really want to extend range practice vocal sighs up and down, practice range extenders for the way up and down. Hope that helps