It’s taken a long time for me to differentiate between close friends, friends, and acquaintances. Close friends are those you can count on during times of need and you’re willing to sacrifice for them. Not so close are those that you might have fun together, laugh a lot, go to events together etc. The second group may become part of former group, but not necessary. It’s important to distinguish between the two groups. The ‘friends’ group can sometimes be trusted, but it’s probably best not to divulge everything. It’s probably best to maintain a polite distance, and be courteous with the third group.
and, gossip of any sort should be minimized.