My advice:

Never choose one of your own compositions just because you're close to the songwriter.

Unless the song needs an introduction that identifies the source, just sing the song and observe -- uncontaminated by TMI -- how the audience reacts.
(Often people will ask where the song comes from. If they don't, it's not always important to tell them.)

If you tell people in advance that you're doing one of your own songs, you won't get honest feedback untainted by the desire to be nice.

If YOU really like a song, go ahead and perform it -- even if you happend to write it.

Genie