you gotta tell her straight up you like spending time with her but you don't want to be tied down. you want to feel pressure to display your affection to the world and that you prefer to remain very private and discrete about your relationship. you tell her this is what you want and that if she's cool with that then y'all could be happy as long as she doesn't disrespect you. and then you let her make that decision. but even if she says yes, she will try you still. so you gotta be ready to bush her at a moment's notice.
it's honestly more work than it's worth if it"s a chick you consider a 6.