I have this song in my head and I can't get it out. The song was at
the end of show or a movie and it goes something like this: "If you
want my love, you got it...If you need my love you have it..."  Please
tell me: It's driving me crazy!

Dear cougar43,

The song is "If You Want My Love", performed by the band Cheap Trick.
It's part of the movie soundtrack of the film "Joe Dirt".

Here are the full lyrics:

If You Want My Love
Words and Music by Rick Nielsen

Ah -
Ah -

If you want my love you got it.
When you need my love you got it.
I won't hide it.
I won't throw your love away, oo.

If you want my love you got it.
When you need my love you got it.
I won't hide it.
I won't throw your love away, oo.

Yes, I thought you were a mystery girl, 
A special girl in this crazy old world.
You couldn't see me when I laid eyes on you.

'Cause lonely is only a place.
You don't know what it's like...
You can't fight it.
It's a hole in my heart, in my heart.

If you want my love you got it.
When you need my love you got it.
I won't hide it.
I won't throw your love away, oo.

You hold the secrets of love in this world.
I'm hypnotized by your ev'ry word.
A special face, a special voice, 
A special smile in my life.

'Cause lonely is only a place.
You don't know what it's like...
You can't fight it.
It's a hole in my heart, in my heart.

If you want my love you got it.
When you need my love you got it.
I won't hide it.
I won't throw your love away, ooh.

If you want my love you got it.
When you need my love you got it.
I won't hide it.
I won't throw your love away, ooh.

If you want my love you got it.
When you need my love you got it.
You won't hide it.
You won't throw your love away, ooh.

Source:
Official Cheap Trick Website: Lyrics - If You Want My Love
http://www.cheaptrick.com/ifyouwan.html

The song is included in the Joe Dirt soundtrack CD, which is available
for example from Amazon.com for $14.99:
http://www.amazon.com/exec/obidos/tg/detail/-/B00005A8GW/104-3776516-1010333?vi=glance

You can read more about the movie "Joe Dirt" at the Internet Movie
Database:
http://us.imdb.com/Title?0245686

Search terms used:
"if you want my love you got it"
://www.google.de/search?hl=de&ie=UTF-8&oe=UTF-8&newwindow=1&q=%22if+you+want+my+love+you+got+it%22&meta=
"joe dirt" "cheap trick"
://www.google.de/search?q=%22joe+dirt%22+%22cheap+trick%22&ie=UTF-8&oe=UTF-8&hl=de&meta=

Hope this answers your question!
Best regards,
Scriptor

Thank you SO MUCH!!! If I had $100 to give away, I'd give it to you
for the awesome answer!