It depends on the person..
usually with hint like:
~ i'm single but i'm not interested in any relationship right now
But if it didnt work i'll go with:
~ gave a short answer
~ not giving him questions even its obviously he want me to ask him about something
~ close answer
~ if he text me i'll not answer quickly
~ if he want to come to my home or ask me out i will only say: hahaha or ummm i'm busy baking/i dont want to go out, so tired.. want to rest at home
If he is so persistent/stubborn (which successfully annoying me) i'll told him directly to stop it and told him in calm mode..
so, basically i dont want to give anyone false hope.. and i dont want to hurt their feeling by saying rude words too.. -_-