The song that you should play while proposing to your girlfriend should be the song that best reflects the moment and the love that you feel for her. Choose the most exquisite song that suits the love you feel perfectly. There are lots of good songs out there. What’s tough is deciding on just one song, and that isn’t always the easiest decision to make. However, if you have issues making up your mind, look over some songs that other guys have used to propose to their girls. It should definitely be a love song that is popular or one that others have used before.
Some examples of some good choices would be I SWEAR by ALL4ONE and (I DO) CHERISH YOU by 98 Degrees. Some other alternatives that you could use include On Bended Knee by Boyz II Men and Marry Me by Train. These are just some of the many that are possible. You can also go with the one song that is special between you and her alone. Just some ideas to help.