frienship is difficult for someone like me

so here's my problem, you see im like a really shy person and well im not really good at making friends and junk. but thats not the issue here. there's this person and I really want to become like their best friends and stuff. we go to school together, but its impossible to talk to them because i only talk to people one on one. we don't really have any time together and they are always around these people that makes me feel um-comfortable.I don't want to be their friend, i want to be said person's friend. so since we can't talk to each other at school they usually text me everyday. That started to p*ss me off that we dont talk in person so i sent them an email threatening our friendship if they don't talk to me. It help a bit, we do have mini conversations in the staircase which lasts for like 2 mins cause it doesn't take long to climb stairs. but like i said im shy so its really hard to idk talk to people first and they just doesn't get that. I know, I know, I can't force people to be my friend, but if we are good friends through text why can't we be good friends in person too? our friendship shouldn't matter if it's through text it should be able to transfer from text to person and we shouldn't have a different friendship in person from text. its just so frustrating! i know sending them that email was a bad idea but even before i sent that email they have been acting strange. They don't even text me anymore :( i really enjoyed telling someone everything but they act like a total stranger now and i really miss talking to them all the time. i dont want to tell them that i miss them texting me all the time because ill sound clingy. i didn't actually do anything to them i'm just very concerned about our friendship and i don't want to drift apart. i know im handling this the wrong way but at least im trying to handle this. but if asking to speak in person is to much for them to handle then i wouldn't mind talking to them through text everyday. they aren't shy like i am and im like why is this so hard for them. you know i could give an effort, i could try if only just only they were alone. and i bet your wondering why i dont text them first i mean its a phone it works both ways. this was the only person that texted me first and that made me feel loved because they were thinking about me to send me a text. but now they dont and i feel like they just gave up on me because of who i am. and when i think about everyone else who i talk to they don't give me this problem they talk to me equally through text/ face to face if they have classes with me or not. if i'm shy or not they don't care they talk to me. but this person its like wow they can talk to the whole world but they can't talk to me? i mean really? they know a lot about me and i know a lot about them. I know whats up with me but whats up with them? they are the def. of charisma, friendly,outgoing,warm and encouraging! ik my mistakes i know you don't have to tell it to me. but what about them? one day they are so caring and stuff and now they act like they don't give a crap about what I say. How can you be this person one day and another person the next day? and another thing they aren't busy, they have no life like I do. they can easily pick up their phone and talk to me like they use too. Maybe they are bored with me? maybe they aren't? but i just kind of wish they told me that they were just going to stop texting me. it is harsher but at least i won't have to look at my phone all the time and wonder if they are going to talk to me or not because sometimes they do on a random day,if you were extremely shy as i am you would totally understand were i'm coming from and why this is so harddddddd. this person was like a human diary and now, now i have to go on the internet and tell a bunch of random strangers how i feel because this person is even more stranger then you right now.