Is a female student considered to be among those whose deeds will not be raised (accepted by God) because she severed ties with a classmate who abandoned her for no known reason, knowing that she no longer speaks to her in the same way?

Deeds are presented on Mondays and Thursdays, and Allah forgives everyone who does not associate anything with Him, except those who have forsaken each other. The forbidden forsaking is the intentional refusal to give greetings upon meeting due to animosity and enmity, and it ceases as soon as greetings are exchanged and returned. So, if you greet your colleague, her aversion will not harm you, and you will be forgiven.