Was it normal?

So uhmmm... Was it normal to behave like that? I MEAN- when I was a kid, we moved to our place rn, and we have this neighbor that I got friends with just after a few days and we ALWAYS hang out at their place. So then one day, our other neighbor's daughter got back, well ofc they're already friends from the start.
I just got this weird kind of feeling that- idk...
Well I saw her talking to the new got back daughter of our neighborhood in their place and... I never talked to her ever since...idk but I got this betrayed feeling before(WTH AHHAHAH) That I thought I were her only one and she was my only one friend like we're supposed to be only friends to each other, I don't want any other kids to have her broo. But until now I still got this kind of feeling when my friends is talking to someone I don't even know of- like how are you guys friends when I didn't even see you guys together even once


Anyways that was a brain rot
I think this is normal on friends... Right?