I have a secret account that follows my friends. Think there's anything wrong with that?
Is there a reason why you created this secret account?
To observe my friend's life, but I've already gotten bored after several months
Stalking people is very illegal and dangerous activity. Have you thought about talking to your friends about being closer so that you don't feel the need to stalk them?
Yes, after half a year and it was a mistake
Trying to get involved more in their lives isn't a mistake. Things will get better but you have to stop the stalking before you get caught.