What should I do if I get blocked by the best friend?

So 3 days ago i got blocked by my best friend. She blocked me after i had a mental breakdown and i apologized after, but after apologising i got blocked, but she didn't blocked me on instagram so i reached to her and apologized again and asked why she did that.
She said she was tired of me, but one week ago she said she couldnt get mad at me even when bad things happened. After she blocked me there i got a lot sad because i said to her a month ago i was in love to her because we already talked for 4 years and i felt something to her and getting blocked by her made me so sad.
School starts tomorrow and i dont know what to do, i fell like i lost a part of my body.
She helped me a lot when i had bad times but i think she got tired.
What should I do if I get blocked by the best friend?
What should I do if I get blocked by the best friend?
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