Acne scars are formed by pustules. So, if you almost never have that form of pimple, you wouldn't have scaring. Your description sounds familiar though. Do you have Rosacea?
The above webpage as a link to pics of what Rosacea looks like, if that helps.
Here's their description: "Rosacea, sometimes called adult acne, is a chronic inflammation of the face of unknown cause and without a permanent cure. Four different types of rosacea have been described:
"Red face" rosacea, with a tendency to face flushing (or blushing), which can progress to a persistent redness of the nose or central face
"Acne"-like bumps and/or pus-filled lesions (papulopustular rosacea), with or without a red face or flushing
Rhinophyma – slow enlargement of oil glands and skin thickening of the nose and sometimes other facial areas, usually in men
Eye problems (ocular rosacea), which may occur before skin changes – a burning or gritty feeling may be present as well as reddening of the eyes and lids."