So I recently gamed this girl however through text messages I found out she didn't like me until a week ago, (I'm a noob what can i say)
she can't explain why, but she does, I think it is because she knows me more, your opinion? And how would you suggest acting to gain raport faster?

Too much rapport and too little fascination/ball busting will quickly make her feel comfortable and mildly enjoying of your company.

Your text game should aim to be at least 1:1 if not 2:1 or more (meaning she texts you at least once or more for every message you send her)

If you don't know if she likes you immediately then you aren't either reading her correctly or you haven't triggered her. Some more detail would be great here.

So basically I met this girl for about 2 and a half hours (im on the younger side) and then texted her for about 2 weeks semifrequently, the ratios were about 1:1 1/4. my text messages were a tad longer, and through this i learned that she liked me only after a week after i met her, i realize because im younger girls dont know what thry want, but she then said she likes people the more they talk to her. so i cut it off there, i didnt want to put in or waste time, this made ke realize how much bullshit is in building a relationship, im wondering what techniques could speed this up?