Across Thousands of Years, I Meet You

I was originally a very ordinary middle school student, but because of a supernatural event, I traveled a thousand years later and gained abilities unimaginable to today's people. However, I was inexplicably involved in a war and made many friends, including him, the person who made my heart ache. I don't know when, I can no longer live without you. I don't know how I should choose. Should I stay in the world where I have lived for 16 years or the world where he exists... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.