It was done for dramatic purposes.

But he came to love jadzia

Wouldn't that be incredibly awkward?It would be like the best male friend of Bruce Jenner falling in love with Caitlyn Jenner.My brain hurts having to make sense of that😩

But Curzon and Jadzia were very different. When the Trill were (supposedly) first introduced in TNG (which doesn't really make sense if Curzon was crucial to the peace deal with the Klingons, years or DECADES earlier - i.e., at the time of Star Trek VI and the meetings at Camp Khitomer - you'd think they would have known something about the Trill by then) it was made out that the symbiont was basically in total control and the host was just a "shell." That changed for DS9.

This is from the episode "Dax":

RENORA: Lieutenant Dax, you're either two hundred years older than I am or you're about the same age as my great granddaughter. At first I wondered which of those you were. Now I am bothered by the likelihood that you may be both. Let's finish this, Commander.

SISKO: At what age did the host, Jadzia, first want to be joined as a Trill?

DAX: I wanted it since I was a child. I worked very hard for it.

SISKO: The competition to become a Trill is very strong, then, among potential hosts.

DAX: Yes. It's considered a great honour.

SISKO: How did young Jadzia finally become a host candidate?

DAX: By winning scholarships, competing against other young people. You're tested in countless ways.

SISKO: Including psychological tests, to determine the strength of character of the prospective host. Is that true?

DAX: Yes.

SISKO: And the young Jadzia excelled in those tests of academics and character, of psychological stability.

DAX: Yes.

SISKO: If you can remember other things, remember that as well. What academic degrees do you hold, Lieutenant?

DAX: I hold Premier Distinctions in exobiology, zoology, astrophysics and exoarchaeology.

SISKO: How many of those degrees did you earn before you being joined with the symbiont Dax?

DAX: All of them.

SISKO: All of them. As Jadzia. Alone. This brilliant and independent young woman has done nothing in her life but contribute to her society. Madame Arbiter, how can anyone justify trying her for a crime allegedly committed by another entity before she was even born?

But still love as in desire sexualy I doubt it

Maybe that's really why he visited the mirror universe a few times? Mirror Jadzia was apparently not joined. So he could bang away and not think about the slug.

That would be like objectifying women and even in the 90's that was frowned upon.

No, it means he could express his feelings for Jadzia without the complications of the Dax symbiont that he'd known for years previously.

So it suddenly is ok that since Mirror Jadzia hasn't got a slug in her for him to put his slug into her ?I think Sisko respects Jadzia's too much for that.

What Happens In The Mirror Universe, Stays In The Mirror Universe!

That's what you think DISC has proved otherwise.

DISC? What's that? Sounds like something to be ignored.

Well we could call it" it that mustn't be mentioned" just like in the Harry Potter movies

Because if you say its name 3 times... Bad Things Happen.

@Nexus71 said:

But still love as in desire sexualy I doubt it

As close friends