creepy honestly

It happened this year actually, this kid who was one of my friends mutuals became a mutual of mine through her and he was nice at first until one day the friend that introduced me to him pulled me aside. And she basically told me how he kind of stalked her and behaved really weird around her cause he liked her. And one day I got an email from said dude saying he liked me, but I haven’t talked to him in months so I don’t and still don’t know how he got my email it’s creepy honestly. And after that he would sit with me and my friends at lunch and just stare at me or at his computer. I was getting creeped out so I started eating else where and avoided him every time I saw him. And now he doesn’t like me anymore nor does he go to my school which is nice and this still creeps me out now cause like how the hell did he find my email when he’s not friends with any of my close friends who have my actual email? And I’m so glad be cause I was this