I unfriended my close friend in college on Facebook out of jealousy without her knowing the truth.

Here's the backstory:

I am a registered nurse and so is she. We just reconnected after five years since we graduated on 2011. I long since given up on my nursing profession from 2014 but she, on the other hand, didn't...so when she was accepted in a prestigious hospital, I got jealous...not because I still want to become a nurse, but because she finally made her dreams come true, while me on the other hand is bitter about life because of my illness...I know I'm a ****** person for dropping her without telling her the whole truth but I feel like in order for me to not have any competing feeling towards her that only damages my mental health, I decided to just end our friendship passive aggressively. I'm aware it's petty and selfish of me to do that.

My question now is: Is it understandable that I did such a thing to my former friend?