My cholesterol is 220, my ldl 80, hdl 80, triglyderides 175 . do i need a statin?

Probably: Your total cholesterol is slightly elevated. Your other indices are healthy, but you would probably benefit from one, as they do more than just lower your cholesterol.

Depends: It all depends on your risk profile, your numbers are good, but there is more to statins then just numbers, for example it helps with plaque stabilization.

Not necessarily: Assuming that you never had a heart attack, you don't need a statin. Your LDL and HDL are really optimal. Your tryglycerides are a bit high, but exercising and decreasing intake of refined sugars and loosing weight if you are overweight should help bring those down to good levels (below 150 mg/dl).