Can you hate someone without reason?

I had an online conversation with a former-colleague-turned-sort-of-friend, Mr. Nun, last night. Something he said got me thinking about the above.

He read my posting about the singer I didn't think highly of. And he concluded that this singer is someone I love to hate. Well well, how about that? That's the first time someone pointed out such thing to me.
Mr. Nun, you go watch Casa Impian, and my ramblings about her being decorative will make sense :Þ Despite my trying to convince him to watch that show, he insisted that it doesn't matter how good (or bad) that singer's voice is, I would STILL hate her.

Hmm... let's just leave that at that.

But seriously, do you think it's possible to hate someone without reason? No matter what that person does, he / she still irritates the hell out of you. Without even trying! Is there someone in your life with whom you have a low boiling point?

Now that I think about it, I do have someone who fits the description. An old friend. (gasp!) Hehe... she IS a friend lah. I've known her since my college years. I love her, but sometimes I find that I easily get irritated with her. She's just so... exasperating! At one time, it only took her laughter to tick me off. No no, before you jump to conclusion, she did NOT get a bashing from me. Hehe.. Before she could annoy me any further, I simply walked away from her, and into the kitchen – pretending to be busy with something. Hehe... that's the only think I could think of at the time.

We're still friends, she and I, even up to the minute I'm writing this post. Occasionally, she still manages to test my patience. Hmm, my guess is that she’s doing it unconsciously. Di luar sedar, eh? ;-) Despite her "endearing" qualities, we somehow still manage to remain on talking terms.

And no, I don't hate her. Hate is such a strong word, don't you think? I only get irritated with her. Frequently. And VERY easily, too. :Þ

Pray tell, how DO you handle friends like this?