I'm not the biggest bob dylan fan but I always like listening to 'All I Really Want To Do' from Another Side to Bob Dylan as it sort of strips away all the not-so-great reasons people want to get with eachother and has a very upbeat message compared to the rest of that pretty cynical album.
Another one is "Everyday is new" by Tanita Tikaram, from one of her more recent albums which didn't really get much attention but I love it, it feels so sunny. I think it was recorded live with the whole band which gives it that sparkly feeling.
"In between two tall mountains there's a place they call lonesome. Don't see why they call it lonesome. I'm never lonesome when I go there." Connie Converse - Talkin' Like You
"All of Me" by John Legend is pretty good. I also really love "Enchanted" by Taylor Swift, "Still Into You" by Paramore, and "Mirrors" by Justin Timberlake. There are so many good love songs out there!
"The writer is by nature a dreamer - a conscious dreamer." -Carson McCullers
"Picture in a Frame" by Tom Waits, "Twin Human Highway Flares" by the Mountain Goats, "Take a Giant Step" by The Monkees, and "You're So Square (Baby I Don't Care)" by Buddy Holly are all favorites of mine
An unusual take on a love song: I just discovered "I'll Take Today" by Gary Allan, and I love it because I think it's the first song I've heard (it might be the first representation I've found in any media!) in which a person talks to his current partner about an old relationship, acknowledges that he did enjoy the old relationship and does look back on it fondly, but also firmly says that now he loves the current partner and wants to be with them.
Some others I like are "Follow You Follow Me" by Genesis, "Where Are You Going" by Dave Matthews Band, "How Your Love Makes Me Feel" by Diamond Rio, and "Sugar" by Tonic.
I'm a big musical theatre person so these might be out of fashion but "Ten Minutes Ago" and "the Sweetest Sound" from Cinderella are amazing. "I'm in Love with a Wonderful Guy" from South Pacific is really cute.
"digital love" by daft punk. it's a simple song about dreaming about a loved one or future loved one "drop pop candy" by Reol. it's japanese and part of it may have been vocaloid, but it's a classic in my book for songs about admiring and love from afar
“I will not say: do not weep; for not all tears are an evil.”
@Jacob if you're okay with explicit songs, I have a few raps that might do the trick.
See You Again - Tyler, the Creator (if you can look past Tyler's pre coming out comments, this song is beautiful and I can't stop listening to it, and it's barely explicit), Ms. Jackson - OutKast (again, not too explicit (although I could be wrong), Big Poppa - Notorious B.I.G. (a classic), Me and My Girlfriend - Tupac Shakur (this one's actually about his gun personified as his girlfriend, but still good nonetheless)
Sailing, by Christopher Cross As I Lay Me Down, Sophie B. Hawkins Kiss Me, Sixpence None The Richer I Knew I Loved You, Savage Garden Collide, Howie Day Truly Madly Deeply, Savage Garden Even Now, Barry Manilow My tastes tend towards the sappier side of things, but I guess that's nothing to be ashamed of.