Obsession

Boy, you're on my brain.
You're in my head.
That's not a good place to be.
It's dangerous in there.

Consider this your warning.
I will not mention it again.
If you fall in, don't tell me
that I didn't tell you.

You amuse me; bemuse me;
Cryptically abuse me.
I like it, I cannot
like you.

Consider yourself an obsession.
Harmless? Probably.
Intriguing? Definitely.
Time consuming? We'll see.