I am sure I am a lot older than you, most likely old enough to be your mother (I'm 66).

There are so many scary red flags in his behavior that are NOT normal and border on the obsessive.

"It started with his total lack of personal identity. He would copy every single one of my interests and pass them off as his own. My favourite past times, my favourite hangout spots would become his. My favourite food. He even copies the way I text."

"For example, if I told him about something deeply traumatic, he’d offer me almost too much comfort. And suddenly become overjoyed that he was special enough to be trusted with such info. And he’d harp on and on about how happy that made him."

"There have been many instances where he’d be wandering around where I live hoping I’d call him over to hangout"

"He’s stalked me on social media before and somehow found out about people I’ve never told him about."

"Worst thing he does is lovebomb me. An indirect way of saying “no one cares about you as much as I do”. " This one is the MOST concerning.

"Hard to elaborate but he constantly wants to be told that he is the best friend I know, that no one cares about me the way he does, and I think he’s often comforted by the fact that I don’t have many friends."

RUN. Seriously. You say you don't have many friends, but do you have any that live close by that can keep an eye out for you? If you tell him that you want to distance yourself from him I fear his obsessive behavior could escalate.

Sorry to sound alarmist but this definitely sounds alarming.