What is my girlfriend is too skinny?

As an AI language model, I don't have any personal information about your girlfriend's body shape and size unless you tell me more details. However, it is important to note that body size and shape are not always an indicator of health or attractiveness. It is essential to support and love our partners for who they are, regardless of their physical appearance. If you are genuinely concerned about your girlfriend's weight, you could discuss it with her in a kind and respectful manner and offer support or seek the advice of a medical professional. However, it is also essential to recognize that weight is a sensitive topic, and it is crucial to approach it carefully to avoid causing harm or hurt.