When someone says hello, reply with a hello and a smile. When someone gives you a compliment, reply with thank you. When someone offers assistance of some sort, accept or reject it with a thank you and a smile. When someone smiles at you, smile back. These are simple cordial responses. Being cordial or nice doesn't mean someone is trying to pursue you.
It's okay to be told how beautiful, handsome, gorgeous, or debonair you look...without it being flirtatious or forward. Accept love in every form without question. If you aren't accustomed to receiving various forms of love, just let go and try. Practice makes perfect...that includes love and all of its manifestations.
It's beautiful to be you...simply beautiful.