If you crave piercing, and like the look and have always wanted it done, do it.
You don't have to have a reason, there doesn't need to be a deep meaning.
You ask if you'll look silly? That concerns me a little, because you either think you'll look silly or you don't. Are you too old? Well imo, you're never too old to do anything, if you're confident, other people's opinions won't matter a jot (there reactions MAY upset you, but only at the level of despairing of the human race in general).
I don't like facial piercings for ME. I have little opinion about how they look on others, it's just not my thing but apart from the rare time I think "ooooh that looks like it hurt" I don't really form a judgement on the person.
I guess the ONLY real issue is if you're in a relationship with someone who really genuinely dislikes piercings, in which case I guess you have to decide what is more important to you. I'm all for saying do it and be damned but if it could affect something negatively that you hold dear, maybe a compromise should be persued. Saying that if your other half would be unable to love you pierced, then is he looking deeply enough at the person you are?
YANBU to ask the question, but ultimately it's your face, your choice, your life...