One thing to pay attention on the platform, is when you see "tick" Friend, means that you are friends with this user. It does not mean that you can friend this person by clicking on it. Because if you click on it you actually unfriend the person lmao... 
Thanks for the info,
well that just means you are friends; if you hover over it, you'll see that it turns to unfriend
true that captain, but some people just click immediately without a long hover and could unfriend by mistake. I have see some of me friends sending me friend requests again. I think it will be something that people just get used to over time
on the other hand, you could have a warning message "are you sure you want to unfriend", but people would complain what if they want to unfriend on a mass scale lmao