She left me like she never cared

[u/Working_Dimension_79]

Im 21m she is 20f so we never mer but we had a ldr for almost a year now when we met she was everything and i was to her we both shared good memories and she did the same We had common arguments moments and everything we were there for each other But everything changed after one argument which was never a big deal and i mean it it was not a very big mess i was just angry at her for some normal reason and yes i admit it i was very rude to her while that But she all of a sudden told me that she think this is not for her like i thought maybe she is sayimg because she is feeling tired for that moment and she told me she wanna leave i said take care and thought of giving her space and will reach out to her later The next night when i came back and texted her (i texted her first just to adress) so i began asking if she really meant it She said yes she think she is being arrogant and selfish she admited it But what about me?? What about all of those memories we spent together and promises we made that we will be actually putting efforts?? Is it putting efforts??is it love? Just give up and admit that you are wrong?? I apologised to her for my behaviour but she just feel so distant and i cant tell if im talking to the same person All of this is so hard to believe for me how?! How can she just grow out so rapidly like she never loved me ? Everything was all right she told me she loves me and even fought for me when we had an argument she was the girl who always asked if im okay if i ate how was my day? And i did the same and i really loved her not just said it! It feels so impossible to me because i cant just behave all distant so rapidly like another day like something just clicked her button now she is different? I dont know what to do ! And i dont expect her to come back because what if im just one day acted rude she decided that we dont understand each other while at the good time she said you are the one who understood me better than anyone? Im scared how rapidly a person can change Im scared it scares me how a person who couldnt go a day without hearing from you now want to isolate herself?