There's a song by that title by a Boston area (USA) singer-songwriter named Don White. It's kind of a signature song for him, and he has recorded it in a couple of different versions -- one of which is a capella with backing vocals on the choruses. It is a very moving story that follows a woman's life from birth through childhood, adulthood, marriage, children, and death. It completes a circle, with the woman ending up cradled in God's arms, which makes her feel just like she felt when she was a baby girl being rocked to sleep by her parents. I can't remember all the words, but the chorus is:

I know exactly what love is Love is real simple and true Love is this feeling my heart gets When I'm being held close by you

Don White is a very engaging performer who puts a lot of humor in his songs -- you laugh through his whole set, until he sings this one at the end and makes you cry. I hope this is the song you're looking for, but even if it's not, you should check this guy out. If someone knows where he can be found on the web, please post it. Thanks.