My LO changed overnight- what is wrong with me?

I had the same LO for over a year, really strongly thinking about them and scenarios with them etc. I would think about them every day. Previously I only had one other LO many years back and was without one for quite a while.

Recently I met a new coworker and I felt absolutely nothing for them- not even the slightest attraction. Until, I had a dream about them randomly one night where we kissed and in the dream it felt absolutely amazing- electric and I swear I had irl butterflies while asleep. I woke up thinking ‘holy shit, what was that??’ Do i actually have an attraction to this person I didn’t realise?

Ever since the dream I have been seeing them in a different light, and now I’m afraid they have become my LO, thinking about them throughout the day. But my previous LO, I haven’t even thought about in days. I feel like I know we will never be together and feel absolutely comfortable with that. How is that possible when I spent so long daydreaming about them? It’s like in order to move on from them I needed someone else to take my mind off them.

Has anyone else had this? Am I constantly doomed to have one LO replace the other?