Why didn't you let her bring up exclusivity first? If she's playing games, just outwait her while continuing doing your own thing, enjoying other girls. When you really actually do have more than one girl in your life, they will sense it. And whoever wants it more will go for it. That's the girl you want, not the one who waited too long.
You want the girl who cares less about holding the upper hand than the other.
You want the girl who cares less about holding the upper hand than the other.