girl is flirty in person but leaves me on delivered for ages

basically the title, but for more context ive known her for a few months now and she has been sorta touchy and really nice to me over the last month, and recently (last 2 weeks or so) has really gone alot further with it all, hugging me when she has a decent enough reason (and like massages my neck/runs her hands through my hair when she does) and according to my friend at one point she was staring at me for like 15 seconds but i somehow didn't notice that, will sit right up against me sometimes when hanging out with friends, will randomly just do something touchy like start scratching my hand or flicking/poking me, sometimes walks up behind me and just plays with my hair and when speaking to her she holds eye contact like crazy i genuinely get on the verge of uncomfortable but i try to hold it, i just suck at that🎉 there was a time she was standing next to me and was upset, and just kind of slid her hand into mine and held my hand too which i almost felt like i hadn't done anything to deserve that kind of contact to be honest.the only thing that makes me unsure is how slow her replies are on snapchat - i say snapchat and not just general social media because when i reply to her stories on instagram she will respond before ive had the chance to leave the chat, but on snapchat it's currently 14 hours on delivered and of course i understand she has her own life, everyone does, but this is quite a commodity at this point. besides, i would have thought that if someone wanted to make time, they would. i was thinking of asking her if she wanted to do something outside of college when i next see her, but this has put me off now and i feel like she just likes playing into the idea of it all with no commitment? i don't know i also haven't really reciprocated that much when she is all touchy because firstly i never know what to do and secondly she is genuinely too good for me, i actually don't understand why she does alot if not everything she does because she could be with someone so much better.