“Maybe” is usually a no in a disguise. Take the mask off and let people move on.

A soft maybe feels kinder in the moment and is usually just the discomfort of saying no, postponed. Meanwhile the other person holds a slot open, plans around you and gets a smaller, later disappointment on top of the first one. A clear no is a gift, because it gives them the day back. You also stop carrying the thing you already decided.

Answer one pending invitation honestly this week rather than leaving it hanging. No is a full answer, and you do not owe a reason with it.