Figment

I love him, I say.

You don't, is the reply.

I do, I insist.

You can't. He's not real.

He is.

Yes, but not to you. He exists, but the he you love is a figment of your imagination. And the he that exists, doesn't know you're alive.

He does!

But not enough to reply back.

That's cruel.

That's love.

Then why do I bother?

Because he is safe, and can never reject you.

But he did!

Exactly.

So it's love?

Only in your mind.