Close friend didn’t congratulate me on my graduation day?

Someone who I considered a close friend, we’ve been friends since high school, we would always hang out, we’ve travelled together, i’ve helped promote her business when she didn’t even ask and more etc. She has also helped me at times which is why I’m confused. I post pictures of my graduation and she watched everything and didn’t congratulate me at all. She even posted on her own page shortly after. I feel betrayed and feel like she’s jealous/hater which I don’t understand as she graduated last year and I of course congratulated her on her success. What should I do?

Close friend didn’t congratulate me on my graduation day?
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