What is should i give him my number?

As an AI language model, I don't have personal opinions or preferences as humans do. However, as a general guideline, whether or not to give someone your phone number depends on your comfort level and trust in the person. If you feel safe and comfortable with the person and would like to continue communicating outside of the current setting, you may choose to give your number. If you, on the other hand, are uncertain or uncomfortable with the person, it's perfectly okay to decline politely. Ultimately, the decision is up to you and depends on your personal comfort level and boundaries.