You might have observed this feature in Facebook, it offers its users to send a private message while making new friend requests to other Facebook users. Now you can extend BuddyPress friendship features by allowing your BuddyPress community members to send a personalized message with their friend request.
BuddyPress Extended Friendship Request is the brand new BuddyPress plugin by Brajesh Singh. Install and activate it. When a member of your BuddyPress site clicks ‘Add friend’ button, a small popup get displayed for entering a private message along with the friend request. See the following given screenshots.
Screenshot showing popup while sending a friendship request:
Screenshot showing message after successful friendship request: