Dreams involving objects like a computer mouse can symbolize communication and control, as a mouse is often used to navigate and interact with technology. In your dream, your friend's computer mouse may represent a connection to your friend or aspects of your relationship with them.

Asking your friend to come for it could suggest a desire to reach out for support or to strengthen your bond. It may also reflect feelings of longing or a need for collaboration in your waking life.

Consider how you feel about your relationship with this friend and whether there are any unresolved issues or a desire for more interaction. This dream could be encouraging you to take steps to connect or communicate more openly with them.