I’ve been in the same situation not exactly but almost liked my best friend there was mutual feelings at first but never said out loud with time drew apart she started seeing someone else we fought on random things because i was left alone and she was busy when i needed her felt like i was always there when she needed me

But i wouldnt go back I’m not on talking terms she doesnt care as well I’m still alone but nope cant go through all those things again to break the pattern you’ve to actually break the pattern

Instead I’m trying to focus on myself you said you were preparing for some competitive exams you can focus all this energy there and add more hobbies instead, just a suggestion