yeah bro i feel like u are kind of overthinking this rather than going with it. i mean ur asking us how much space u need to give her so u "seem" like a chase. how often to text her or call. sh1t most girls i end up dating hit me up every day. the way i make them chase is i end the convo's quicker than normal most of the time. they will then want to call me more. then i also pretty much have a frame of a fun, random, playful tease. ill tease her in bed to make her want it more, beg me for it more, want to kiss me more often, will want to cuddle. overall being a tease makes a frame that they are almost always chasing you. and as far as the relationship bro. u dont need to ask her. u need not only keeping having fun and gaming her and the topic will come up naturally and then it will feel right cause both parties want it.
and it is always games. people are really lead by there heart a lot and feelings get thrown around a lot. so in the "game" of love, u need to know how to deal with the game and the rules of the game. u need to stop overthinking and just go with it bro. i have seen so many guys that have a good interaction going but will not notice and take advantage of it because there sitting there trying to analyze every single movement, ioi, and basically trying to see what im seeing from the sideline. u need only go with it and then about that stuff after. im sure if she is into you then a relationship is going to naturally come. and sex in some ways complicates things because that intensifies there attraction to you. so then if ur being the chase and she wanted u to be all charming she might get a little upset. sex before a relationship doesnt ruin it for the relationship, u just need to know how to handle it. im sure u can have sex right now and still have a great relationship and my advice is that u should have sex. im sure she has thought about it as well.