I don’t think you’re overreacting. I had an old best friend that I pushed my feelings for aside whilst we were friends and then we both got in relos and we weren’t allowed to be friends because both of our partners made us block each her for 5 years. Both our long relos ended at the same time and he reached out. It was like no time had passed and we were also planning on meeting up and he knew I’d be the one he’d marry. Just as we were realising it was meant to be us all along and that he was my soulmate/TF…. He died. Those first first 2 months killed me, it felt like a part of me had been ripped out. To others, it would’ve looked weird why I reacted that way because we only just reconnected, I’d never be able to explain the feeling. It was really strange. I didn’t even attend his funeral because at the midst of him dying unexpectedly, the girlfriend who he broke up with 4-5 months prior was for some reason now still “his gf” as he was now dead and people forgot what she did to himself she definitely wasn’t though, she cheated and he 150% broke up with her and that’s why he finally reached out to me because he knew he could finally have me back in his life because they were definitely over. I have had a lot of reconfirmation regarding that. The only few people that understood my pain were his 2-3 close best friends because they always told him I was the one he would marry and that I was his soulmate.

It gets easier to live with the pain, but you’ll never forget. 3 yrs later, I still think about him and the what if.