Okay, because I am the Goddess of identifying romantic tension, and I'm SICK of people being CLUELESS about the love-feelings of the characters of Naruto, here's how it breaks down.

NOTE: THESE WILL CHANGE. And please message me (or comment) with unlisted characters, and your speculations. Please also give examples (episode numbers) OR reasons. ^_^

NARUTO:
Loves Sakura.
Sasuke?

SAKURA:
Had a crush on Sasuke, but she's grown out of it.
Is falling in love with Naruto
Speculations among the fans about her and Ino

SASUKE:
For the moment, is asexual.
There are speculations among the fangirl community about him and Naruto.

HINATA:
Has mega-crush on Naruto.
This won't work out.
So she'll probably marry Neji or someone.

SHIKAMARU:
Finds women annoying and troublesome.
However, TEMARI will convince him otherwise. (AKA, "SEE TEMARI")

CHOUJI:
Unclear at the moment.

INO:
Has this age-old crush on Sasuke.
Is doing this more out of habit than anything else, at this point.
Is falling in love with Chouji. (Also, getting rid of her shallow ways)
In a similar way with Naruto and Sasuke romance, she is thought of with Sakura


KIBA:
Unknown.

TENTEN:
Lesbian?
Crush on Lee?

SHINO:
Wants to protect Hinata. I don't know if this will lead to romance.

LEE:
Has a crush on Sakura.
Will eventually give her up to Naruto.
Speculation about him and Gaara (ew.)

NEJI:
Unknown.
As in, he himself doesn't know of any sort of romantic feelings.

KANKURO:
Doesn't care much.

TEMARI:
Loves SHIKAMARU.

GAARA:
MINE! ...I kid.
Uhm, unknown.
Speculations among fans about him and Lee. (ew.)

OROCHIMARU:
One of the Sannin.
Has lots of 'servants'. Otherwise, he's pretty much too evil to love.

KABUTO:
Obviously, loves Orochimaru on some level.
This would be either that he admires Orochimaru's power, or actually loves him. You decide.

KIMIMARO:
Feels the same way towards Orochimaru as HAKU does towards ZABUZA (See: HAKU)
Apparently, loves Juuga. (Whoever that is...)

OROCHIMARU'S OTHER SERVANTS:
Either live in fear, or love.
The fear hate him.
The love... see KABUTO.

KAKASHI:
Unknown, though I've heard many theories.
These include IRUKA and other jounin.

IRUKA:
A speculated character.
Respects Kakashi as a superior, and has connections with him through Naruto.
Feels towards Naruto like a father-figure.

THIRD HOKAGE:
Ewwwwwwwww...
...anyhow. He got married at some point (obviously). I think she died.

FIFTH HOKAGE:
Tsunade.
One of the Sannin.
A speculated character.
For now, I will say SHIZUNE.

SHIZUNE:
Loves the FIFTH HOKAGE.

ZABUZA:
Loved HAKU when he was still alive, though never admitted it.
Of course, he showed it in several ways by saving Haku and whathaveyou. They also just look good together.

HAKU:
Loved ZABUZA when he was alive.
Like, with a reverse-savior complex he fell in love. It's pretty sweet, actually.

ITACHI:
Sasuke's brother.
He seems to enjoy watching Sasuke grow stronger.
Speculations about Kisame and (more rare) Sasuke.

RAIGA AND RANMARU:
From a filler arc. See ZABUZA AND HAKU.

SAI:
Blatantly, obviously, etc., gay.
Who will he end up with? I don't know; watch(read, whatever. Eyes are involved) to find out.

JIRAIYA:
The Perverted Hermit.
One of the Sannin.
Will never commit to a relationship; he likes his porn too much.

ASUMA:
OFFICIALLY WITH KURENAI

KURENAI:
OFFICIALLY WITH ASUMA

KISAME:
Speculations about he and ITACHI...

OTHERS:
I don't know enough to tell you.
Inform me, though, about anything I didn't include that you think I should. And thanks.