Did anyone else get too attached to their first playthrough?

I played karlach on my first and so far only full playthrough, and im having a really hard time playing as anyone else. I started a new character and when i encountered karlach, i felt this sinking feeling in my stomach, im not sure why but it just feels wrong playing as anyone else after all the hardship and joy and accomplishment i felt with my original party. The only way i can continue to play the game now is to just reload old saves from my first playthrough and start over. Ive never played DnD but i imagine people get this same feeling when their campaign is over or their party is killed, i just dont know how to restart without getting sad thinking about my original party. Im not sure if this is the right sub for this, i just wanted to know if anyone else feels the same way, this is the first time ive ever felt so attached to my party in any video game.