Who is Extreme67?

Hello my name is Dave and about 10 years ago in 2008 I used to play Roblox all the time when I was little. My username was Gaminglord11 Because I thought I was the best at gaming. But one day I logged onto Roblox and I wanted to play a new game because I used to play the same game all the time I played some random paintball game but I was getting sick of it so I went to find a new game. I was just searching through games until I came across one called “extremely depressed game” And there was one person playing I decided to play the game because I was pretty board and there was someone playing. So I joined the game and everything was very dark I couldn't find the other person in the game even though it showed his name in the player list. His username was extreme67 since I could not find him in the game I decided to say something in the chat and see if he responds I typed “Hello?” almost immediately after I said that in the chat extreme responded “WHOS THERE?” In all caps. I was getting a little freaked out and decided to leave but before I left I said “I am just going to go” but then he replied saying “don't leave I want to be your friend” I was getting scared and left the game. The day after all of that I logged back onto Roblox but I was friends with someone I did not remember adding as my friend it was extreme67 I clicked on his profile and noticed that he was the one who made the “extremely depressed game”  I was freaked out and logged off. Later that night I told my dad about extreme67 and my dad said “I dont think its safe for you to play that game anymore” so I stopped playing Roblox but 4 years later in 2012 I logged back on and the extreme67 guy was long gone it said by his profile “last seen 4 years ago” So I thought it was safe to play until the summer of 2013 he came back online and messaged me saying “I missed you” and ever since then I have not logged back into Roblox until yesterday and extreme67 was online.