Teachers Staring

I have a very strict dress code that I follow. And never had I had a problem with boys flirting or anything bad. It's from my male teachers. They always ask how I am doing and they stare and give me special help sometimes. I know they do because I notice how they treat other students. And my friends have pointed it out too. What should I do about it? My Princple also does it. So I feel like I can't really bring it up to him. I have one friend that says to just deal with it and take advantage of the extra help. Idk what to do but as the days go by, I feel less comfortable at the school.