What do i do, this girl i know likes me, but we just met so its going slow... but anyways, she goes "whatsup..." and i use some good txt game reply, forgot what it was SPAM, but anyways, i ask what she is up to, and she goes

"thinking about stuff" .

Is that a hoop? like my AFC side would go "thinking about what?" but i think thats not the right thing to do... should i just not reply?

I'd use a bit of c&f and say, "Thinking about stuff huh? Yea...you're prolly thinking about me!"...then i'd prolly go on some random tangent and talk about nothing, but have fun doing it.

well seriously i found it sort of depends how old you and the girl are aswell if your ,say, under 16 just go through the hoop and work "really? what are you thinking bout?" it'll probably work regardless i found.. but yeah if your over 16 use c&f "haha cant keep your mind off me eh?" or "since when did you start calling me 'STUFF'?"
as for not replying, theres a risk in not txting back when shes trying to get intimate.. perhaps you dont reply in that situation, she starts thinking "ohhhhh no.. he doesnt seem interested.. i got to get him!" she'll apply herself more..you will know this is the case when she'll txt you more often asking afc openers like "hey whats up?" and shit. but the opposite could happen aswell "ohhhhh no.. he doesnt seem interested.. im going to forget him!" then the moment you start txting her, she knows she has you in the bag and will probably lose interest because you came to her too easily.. if she seems to have forgotten bout you leave it for a few days and txt her using pua stuff.. i like these ones "wow! i need to ask you a question?" or "shit you never guess what just happened"... 'HB:reply"OMG what?'... you:"oh na d.w.."

ps i know i may have gone maybe too much in detail but you might hit this wall sooner or later and its quite handy to know.. trial and error is time consuming and damn annoying!! hahaha trust me lol