Always the bridesmaid, never the bride
That’s what they say
But there’s so much more to me
Than my marital or relationship status

How about
Always kind, never cruel
Or maybe even
Always thoughtful, never superficial

Always helpful, never neglectful
Always smiling, never sad
Always enthusiastic, never a drag
Always hopeful, never doubtful

Always sees the best in others
Never belittles or derides
Always wanting to make you smile
Never wanting to hurt you

Never is s strong word
So final and concrete
Life isn’t always so absolute
Maybe “not always” would fit better?

Always supportive, not always supported
Always dreaming, not always achieving
Always here to please, not always satisfied
Always behind the scenes, not always center stage

Always doing more, not always appreciated
Always fighting, not always winning
Always have things to say, not always heard
Always a little sister, not always an equal

I am more than my social standing
More than my failures and shortcomings
I am more than society sees
More than people realize