I’m looking for sincere advice.

I'm a 23-year-old male currently pursuing my master's degree in Australia. After 1.5 years, I returned to Delhi for my vacation. Everything was going well with my 19-year-old girlfriend, and we were both enjoying time at home in India. Unexpectedly, she decided to end our relationship after nine months together. There was no argument or disagreement that I can identify as a reason for this decision. Following the breakup, she blocked me on all platforms, including LinkedIn, and we've had no contact for the past month. I've been struggling to move on and have fallen into a state of depression, which has overshadowed my vacation. Despite feeling like I did nothing wrong, I'm anxious about returning to Australia because I know I'll see her again. I still have a month left before I go back, but I'm unsure about my next steps. I can't afford to delay my return due to the investment I've made in my education, especially since there's only one semester left. Can anyone offer me advice on how to handle this situation?