How do you tell someone you want to bed them? You make sexual innuendos, escalate, have fun, touching, kissing.She's one of the rare kind that I would actually consider a serious relationship with. What do you mean "covertly tell her what you want"?
How do you tell someone you want a platonic relationship? Talking about problems, work, doing mundane stuff, keeping each other at an arms length (which she is basically doing to you right now by leaving you on read lol)
Covertly means giving someone signals of what you want instead of directly telling them with words.