Similar to PP, I have loved all the kids I have cared, for I have a deeper attachment to some, so much depends on the dynamics of a job.
As far as my thoughts of them outside of work, I will always wish them well, and some of the families/ kids I'm still in touch with.
But I think when I was younger I thought of the families more as mine. That's not to say I don't care about them after hours or connect with them after hours, but I have things in my personal life now that I suppose fills that spot. I'm not sure I worded that correctly.
The first jobs for me kind of like a first love everything is new and having to leave a job for the first time is crushing, and it's not that you don't love or feel sad when subsequent jobs end it's just that you've been there before. The first cut is the deepest and all that.
At least that's how it is for me.
Burn out is also very real. I've had to change it up every now and then to make sure my batteries were charged.
So no, you are not alone or abnormal.