Am I stupid?

You never know what was happening today. Two high school students were holding each other tightly, and then began kissing, right in front of the school gate, in the middle of the day.

It was the first time I saw a situation like this. They looked like thirteen years old or so.

Many people walked by; some of them were perhaps their teachers or classmates. I was shocked by their braveness and also wondering whether they were mature enough to fall in love.

Did they really know what love really is? I was like an idiot and never thought about having a boyfriend when I was in high school.

Even now, I still don’t know what true love is. Am I stupid or has been the world changed?

Comments: 

- wondering is not wrong but since you used "shocked" at the beginning of the sentence, wondered would be more natural.

- Did they really know....  it would have been better if you started with:  Watching them made me feel like an idiot. I would never have thought about having a boyfriend when I was in high school.

- Even now,.... you can also say  Even today,.... 

Am I Stupid?

You never know what was happening today. Two high school students were holding tightly, and then began kissing, just in front of the school gate in the middle of the day. I first time saw the situation like this. They looked like thirteen years old or so. Many people walked by, perhaps some of them were their teachers or classmates. I was shocked by their braveness and also wondering whether they were mature enough to fall in love. Did they really know what love really is? I was like an idiot, never thought about to make a boyfriend when I was in high school. Even now I don’t know what true love is. Am I stupid or has been the world changing?

Am I Old-Fashioned?

You'll never guess what happened today. Two high school students were hugging and then began kissing, out in broad daylight, in front of the school gate!  It was the first time I have ever seen a situation like this. They looked so young.  Many teachers and students walked by.  I was shocked by their public display of affection and wondered whether they were mature enough to fall in love.  Did they really know what love was? 

I never thought about having a boyfriend when I was in high school.  Even now, I still have not experienced love. Am I old-fashioned or has the world been changing?

Am I Stupid?

You'll never know guess what was happeneding today. Two high school students were holding hugging/embracing tightly, and then began kissing, just right in front of the school gate in the middle of the day and in broad daylight! It's the very I first time I saw the such a situation like this. They looked like thirteen years old or so (他们不是高中的吧？）. Many people walked by, perhaps some of them were their teachers or classmates. I was shocked by their braveness boldness/brazeness/openness and also was wondering whether they were mature enough to fall in love. Did they really know what love really is? I was like an idiot, never thought about to make having a boyfriend when I was in high school. Even now I don’t know what true love is. Am I stupid or has been the world changeding?

你几岁了？好像25-27？ It is nothing unusual where I live! 老鬼