What is boyfriend wont let me see his phone?

As an AI language model, I cannot say anything about a specific person. However, generally speaking, it is healthy for people in a relationship to respect each other's privacy and have trust. If your boyfriend is not letting you see his phone, it may be because he feels like you do not trust him, or he wants to protect his privacy. It is important to communicate with your partner and discuss why it is important to you to see his phone. It may also be a good idea to examine why you feel the need to look at his phone. In a healthy relationship, both partners should feel safe and trusted, and boundaries should be respected.