“What’s Love Got to Do with It” Tina Turner
“Ever Fallen in Love (With Someone You Shouldn’t Have Fallen In Love With)” The Buzzcocks
“Help Me” Joni Mitchell
--------Self Esteem by Offspring:
Now I’ll relate, this little bit
That happens more than I’d like to admit
Late at night, she knocks on my door
She’s drunk again and, looking to score
Now I know, I should say no, but
That’s kind of hard when she’s ready to go
I may be dumb, but I’m not a dweeb
I’m just a sucker with no self esteem
--------------Crazy by Patsy Cline:
Crazy for thinking that my love could hold you
I’m crazy for trying and crazy for crying
And I’m crazy for loving you
Crazy for thinking that my love could hold you
I’m crazy for trying and crazy for crying
And I’m crazy for loving you.
Ooohhh, the Joni Mitchell post made me think of the scene in Love Actually, where Emma Thompson gets the CD, instead of the beautiful necklace she thought she was getting, from her husband (after finding it in his coat pocket) for Xmas, so then realizes he’d bought it for someone else…sigh…Both Sides Now, and a great version. 
Nitpick: Crazy was written by Willie Nelson
“Why Do Fools Fall In Love?” - Frankie Lymon and the Teenagers
“Never Gonna Fall In Love Again” - Eric Carmen
“Fools Rush In (Where Angels Fear to Tread)” - written by Johnny Mercer, recorded by many
"Hope You Never". by Tom Petty.
Not as direct as some of the other examples in this thread, but clear from the song that he’s in love with someone he doesn’t want to love.
‘Falling for you’ - Weezer (my least favorite song on Pinkerton)
A better song is ‘Are you a hypnotist?’ by The Flaming Lips.