we are day dreamers

I didn't know what i did wrong but Jaclyn told me this:

Things are different. People grow up and thing changes.
As long as we treat friends sincerely, it doesn't matter who leave us. They may leave and we may feel sad.
One thing for sure, we should not blame our self for certain things sometimes.
 As that will only lead us to be feeling more upset. And frankly speaking not everyone will care.

Thanks girlfriend. It makes so much sense. :')