I have never visited the etherflyer but is it possible to log in there forever same as the forum? did you gave your private keys to your friend? why is it that your friend has been mentioned? it's also possible that you have logged in to the wrong website and a phishing site.
I just don't get it that why you have thought it's your friends fault. It should be your negligence since it is your private keys.
I mentioned my friend because most of my friends are into crypto and they can sneak into my pc when I am away without my notice.
And with the question that I log in forever, Yes, I didn't enter any password before logging in again. I was sent to my dashboard the moment I entered the etherflyer site.