hi,
from ur description, i guess u are the one starting the game first. when he is into it, u were cool. hence u have successfully created an impression of no interest in him. that explain why the flame goes off.
if u just want companionship, then at head start make things clear. All women enjoys courtship but enjoy it at the proper way, and enjoy together with him.
u can be friends with him, but he will not become ur friend. becoz u are the one who hurt him. put urself in his shoe. be it u have it clear or not at the start.
at the moment, your life stage is at knowing more people and enjoying various companionship. so delay your lovelife for a few more years and grow up to be a better person(cultivate responsibility) before u get involved with another person.
good luck!