Alright, here's something fun. Let's name three songs about love. But... I'm looking for something specific.

The first song has to be about unrequited love, or about being dumped, or cheated on, or being obsessed with someone who doesn't like you. (You are in love, the other person is not).

The second song has to be positive about love: true love, things going great, etc. (You are both in love).

The third song has to be about cheating on someone, or no longer liking someone (even if they like you), etc. (You are not in love, the other person is).

And... we can't repeat artists that someone already posted. I'll start:

01 Rolling Stones — "Beast of Burden"
02 Method Man & Mary J. Blige — "I'll Be There for You/You're All I Need to Get By"
03 The Roots & Cody Chestnutt — "The Seed 2.0"

Formatting for the lazy:

01 They Might Be Giants - "I'm Your Boyfriend Now"
02 They Might Be Giants - "She's An Angel"
03 They Might Be Giants - "I'm All You Can Think About"

You meant we can't repeat artists that someone else already posted, right?

I'll give it a shot:

01 Don Henley — "Last Worthless Evening"
02 Eric Clapton — "Wonderful Tonight"
03 The Cure — "How Beautiful You Are"

I had to use that gimme with Clapton because it's was a tad hard for me to think of a happy love song. And I was going to use McCartney "Goodnight Tonight" for track 1 but that would have been uncouth.

1. Tony Rich Project - Nobody Knows
2. Erasure - Always
3. Weird Al Yankovic - I Was Only Kidding

01 J. Most — "Her"
02 Beach Boys — "Our Sweet Love"
03 June & the Exit Wounds — "Idly by"

01 Megadeth — "Trust"
02 Prince — "Shhh" (Love making is positive, right?)
03 Lee Hazlewood — "I'd Rather Be Your Enemy"

1. Big Star - "Thirteen"
2. Big Star - "I'm In Love With a Girl"
3. The Replacements - "I'm In Trouble"

01 Mos Def — "Ms. Fat Booty"
02 Bright Eyes — "First Day of My Life"
03 10cc — "I'm Not in Love"

1. The Rays - "Silhouettes" (if it doesn't count since no cheating actually occurred as we find out late in the song, then...The Shirelles- "Baby It's You")
2. Notorious B.I.G - "Me & My Bitch"
3. The Mamas and the Papas - "I Saw Her Again"

The Cure has already been used.

Here's my Gods of Punk Mix Tape

01 Ramones — "I Wanna Be Your Boyfriend"
02 The Clash — "Janie Jones"
03 Sex Pistols — "Liar"

Missed that in the OP...will edit, thanks

the only "love" song going through my mind (and bleeding out my ears) is Minnie Riperton's - 'Lovin' You'

01 Morrissey — "The More You Ignore Me, the Closer I Get"
02 Van Morrison — "Have I Told You Lately"
03 Dead or Alive — "Brand New Lover"

Actually Wonderful Tonight is about how Patti Boyd took FOREVER to get ready for a party one night. It's not really a love song. It's a man bitching about his wife.

01 The Shins — "Turn on Me"
02 Silvestre Dangond — "Me Gusta Me Gusta"
03 Nelly Furtado — "I'm Like a Bird"

The first song is definitely the easiest one to think of.

01 Journey - I'll Be Alright Without You
02 Elvin Bishop - Fooled Around & Fell in Love
03 Sanford Townsend Band - Smoke of a Distant Fire

01 Antonio Carlos Jobim — "The Girl from Ipanema"
02 Kenny Rogers — "Through the Years"
03 Human League — "Human"

1. Bob Dylan - "I Don't Believe You"
2. Crosby, Stills, and Nash - "Our House"
3. Guns and Roses - "Used To Love Her"

1. The Beatles - "You've Got To Hide Your Love Away"
2. The Beatles - "Something"
3. The Beatles - "Sexy Sadie"

01 Tinted Windows — "Messing with my Head"
02 Weezer — "Buddy Holly"
03 Fleetwood Mac — "Go Your Own Way"

The Magnetic Fields:
01 — "All My Little Words"
02 — "The Book of Love"
03 — "Either You Don't Love Me or I Don't Love You"

01 Skid Row - I Remember You
02 Harry Chapin - Sandy
03 Commodoors - Sail On

01 Mazzy Star — "Halah"
02 Billy Joel — "You're My Home"
03 Dixie Chicks — "Goodbye Earl"

1. Bloodhound Gang - The Ballad of Chasey Lain
2. Harry Connick, Jr. - Jill
3. Del Amitri - Be My Downfall