Your coworkers aren't your friends LEARNING THIS NOW

I think the TJ's environment enables sharing your private life with your mates and coworkers and it's hard to draw a line between what's personal and what's professional. I have really nice mates and get along really well with one of them and we joke around but at the end of the day I have to realize he's still my boss and my coworkers aren't my friends even tho I get along well with all of them. Thankfully learning this now--even tho I've messed up in sharing a lot of my private life bc I'm an open book--Anyone else feel like this???