Is it normal i no longer care

I no longer care when someone moves on from me. I recently fell out with a friend, not really in a bad way we have nothing in common, and the other day a guy revealed he's not sure he wants to see me. When I recieved his message about that I shrugged and closed down the conversation, then went back to what I was doing. That's because I couldn't care less, I recently bought a membership to a dating website impulsively and i've got many messages. As usual. I don't even want to see anyone so that was a waste of my extremely tight budget LOL.... I no longer care about relationships, that's why. I dont know why.

Then this morning I experienced a very odd euphoric state that I guess normal people would refer to as happiness. I was a little worried about myself because I had only positive thoughts in my mind.... Yet I was headed to therapy that I just started, and I have to take the bus there and I can't take the bus because of all the people and the sensory input on buses which nearly everytime triggers migraines for me and while taking the bus daily when in high school years ago that certainly didn't help but instead worsened the effect public transport has on me. So yeah usually I have murderous fantasies about the other passengers but this morning.... I had GOOD thoughts??????? I noticed positives about other people and when I couldn't make the bus ticket scan fast when stepping on the bus so people started sighing it didn't trigger severe anxiety that haunted me for the rest of the day, I just felt "who gives a damn" and sat down with a smile..... So I am a little worried. There was no reason for the feelings I had of carefreeness and positive thinking yet they existed inside of me. Maybe it's losing the dead weight of a useless friend, the heck do I know.