I've noticed this in life. There are certain people I have a bond with on a level I can't explain, and it's not romantically in the least bit. I've always thought maybe they were someone close in a previous life.
Throughout life you will meet one person who is unlike any other. You could talk to this person for hours and never get bored, you could tell them things and they won't judge you. This person is a soul mate, your best friend. Don't ever let them go.