mhmmm
1. sounds to me you are a chatty-patty and she gradually lost interest in you
2. you are/were way too excited over her. she sensed it and got turned off.
i've always said this before, imagine if you had the chance to date your favorite celebrity crush. u go on a date and u fucck. now, shes sprung over u. texting u all the time. giving very, very clear signals that she wants u and is obsessed with you. what do u think that will do to you? you'll start to feel urself on some "yeah, im that n1gga. if i can get her, i can get more like her".
and what happens is, u start to either subconsciously or consciously start looking for the next level of chicks u can get. "how high can i reach". you said you're 6'1 and from your posting history, sounds to me ur not a bad looking guy either. she thought u were a level above her. but due to your constant yapping and being an open book, and texting her titangraphs, she realizes ur a lame (no offense) and not a man of importance.
3. the last three paragraphs sealed ur fate with this chick. u shouldnt have unfollowed her on IG. its one of the reasons i dont use social media. the temptation to go snooping or getting alerts about chicks u really like will drive u nuts. so its better to block that loophole.
think about what you said to her. "i've got some stories for you". that tells me all i needed to know. she probably thought, oh hell nah i aint trying to hear this n1gga blabbing like a lil girl acting all emotional. stop joking too much with these chicks on the phone. it can always go wrong. girls have a fine-tuned ability to zone in on desperation, anxiety, eager-to-please..ism lol. the more u talk, the more u give urself way. after not seeing her for so long, when she texted u, what u should have said was on "time with fam was cool. you need to bring your cute lil ass over here and spend time with me" - that will lead directly into sex talk. u think my ass is lil?? lol. then u be like, well i havent seen it in a while. come by at 6pm tomorrow. (notice there's no d1cking around in these convos)
not to give u false hope, but this girl sounds to me like the type that would be on several other apps. so what u can do if u really want her bad is put up brand new pictures of yourself on different apps. and sooner or later she will come across u and will probably swipe right and use that as a segue to yall linking back up on some "what happened to you??".