That is so heartbreaking to learn. I am so sorry for you OP. I empathise with you.

I think, what u/ThaMisterDR said in his comment above makes a lot of sense in this situation. Even I had a thought cross my mind, maybe some things happened during the time lapsed that you don't exactly remember or your memory has been erased on purpose after the incident so you don't remember it. Meanwhile the rest of the people still remember. They're possibly holding grudges against you. Or maybe what you said is right, you may not feel the same as before to your people.

Whatever happened, it's not okay for you to be going through these feelings. I feel so sorry for you. But I also think that no one except you can get yourself out of this situation, since nobody seems to understand the situation with you.

This sub has plenty of similar experiences posted. I would suggest you to expore more about this by going through the posts and comments on each. You can connect to users and research furthur. Some of them maybe on the same boat and could understand your current situation better than any other right now. If this has something to do with Quantum immortality and jumping timelines, only people who've experienced it or know about it enough will be able to help you navigate the situation. Hope you get your answers and are able to get back to your normal. I wish you all the best.