It's amazing how much can change in a year... (but i still have questions!)

So, at the moment I'm quite surprised at how much can change in a year.
This time last year I was with someone, I was stress-free; I had a lot of spare time to myself. Life was simply bliss!
Today, a year later I'm single, I'm starting to stress over the upcoming exams, and the spare time I do have, I spend studying for TEE. Life is quite chaotic.
I’m currently confused about some things. A year ago I probably wouldn’t have put so much thought into the things I do now.
I’m not going to go into much detail as this is on the internet and well, I don't really want to get into it anyway. But I do have questions for you.
-Would you say you are the same person you were a year ago?
-How old were you when you had your first kiss?
-Have you or are you currently doing TEE? Are the exams worth stressing over?
-If you could change 1 regret would you?