system
sentimental: I am feeling wistful about my oldest son starting his senior year in college. I can't believe his childhood is over.
gpt
My son is starting his senior year.  I am finding myself feeling so emotional about it. 
human
You must be having bitter ,sweet emotion.I remember my mom was also emotional when i left boarding school for the first time.
gpt
Yes, I have this feeling of excitement for his new adventure, but also worry. And I'm just going to miss him so much, he's a wonderful kid.
human
But you can make arrangements such that you see him every weekend.
gpt
I don't know that he'll appreciate that! Mostly I think I'll look at his childhood pictures for a while and have a good cry.