Is losing friendships in early 20s normal or am I just f*cked up?

r/

It’s about my (F21) life-long friend (F21), we were literal soulmates. We would always help each other, had similar interests, yada yada, you know what I mean. I just felt so loved and listened to when I were with her. We went to different schools but we grew up in the same city so we were always close. Then we went to college (we chose the same college in the different city, but it wasn’t intentional), where she rented a flat with her another friend and I lived with random people, but it wasn’t the thing that bothered me at all. What felt unusual to me was the fact that she consistently started leaving me out. During 1st year of college she would only text me when she needed help with something (usually regarding college stuff, as helping her with choosing classes, which I didn’t really understand how I would even help, since we chose totally different majors, but I felt obligated help anyways). She would ask me to go to the cinema with her, because there was a movie with her fav actor. But when that was me who asked to meet up, she would decline. She told me her sister had a birthday party and she wanted to visit her – later it turned out she hadn’t hosted the birthday party at all. I asked her to meet up for a movie night and she told me she would let me know later – well, she never did. Later she excused herself that she thought I had a lot of stuff going on, a lot of material to study – yeah I had, but it doesn’t mean I’m always busy, plus it was me who proposed! So, we would only meet when she wanted to. Then we hadn’t had any contact since last December, cause I felt drained by constantly seeking for even a dumb chit-chat when she obviously didn’t want to. Last month she finally texted me only to… ask if I want to rent a flat with her or if any of my acquaintances are looking for a roommate because she and her friend aren’t planning to live together anymore and she’s looking for a new one. I declined only because I’m an early riser and she’s a night owl and explained to her that it’s not gonna work and we’re gonna disturb each other. She tried to talk me over for a couple of days. I told her to stop forcing me, she got passive-aggressive. It hurt me a lot what she said. She hasn’t contacted me since then. I don’t understand why, though… It’s only a flat. I’ve already lived with 5 different roommates I didn’t know before, so why can’t she?

I know people all over the world have way worse problems as terminal illnesses, wars etc. and I’m not complaining. I’m still glad I met her, I’m grateful I had a friend in her and that I could be her friend as well. But I feel this relationship is just not the same as it was. I don’t know who’s the one who fucked up. I literally don’t know what went wrong. It looks like we simply grew apart. We still live in the same city. It just… hurts. Especially when it’s all about your childhood friend, who has been a part of your life since almost always.

Also sorry for any grammar and punctuation mistakes as English isn’t my mother tongue.

TL;DR: My childhood friend started acting weird towards me and ignoring me since we went to college and I wonder what went wrong.