Yes, you do need a glucose meter. One of these can tell you instantly what your meal choices are doing to your blood sugar levels, giving you the opportunity to tweak your diet. Unless you are on a glucose lowering drug (Metformin is NOT one of these) you will most likely be told you don't need to test by your nurse/GP, but how else are you going to manage your diabetes without one? The vast majority of us T2s self fund our meters because they are the only tool we have, and are important.