Concubine, Friend, Lover

Sometimes I feel like a concubine
Come when I"m called and you are all mine
Other times I feel adrift
Wonder if in your life I fit
Then I get a note from you
Letting me know what you've been through
A friend in those times is divine
Glad you let me know in the nick of time
Many times I feel like your only lover
And get jealous when I think there's another
But I have to put my mind at ease
And be glad that in these ways I can please
So what does it matter the labels I may gather
Being with you anytime is what matters
I'll play concubine, lover, and friend
Because in my life no one else fits that trend