What is the name of the goddess that was to beutifull to see her own reflection?

The goddess known for her beauty and who was captivated by her own reflection is Narcissus. However, in mythology, it's actually the nymph Echo who was infatuated with him. If you're referring to a goddess specifically associated with beauty and often linked to themes of vanity, that would be Aphrodite in Greek mythology or Venus in Roman mythology.