Maintaining boundaries in global friendships involves setting clear expectations, respecting each other's privacy and autonomy, and communicating openly and honestly. Start by discussing and establishing boundaries with your friend, such as preferred modes of communication, acceptable topics of conversation, and personal space considerations. Respect your friend's privacy and autonomy by refraining from sharing sensitive information without their consent and honoring their boundaries and preferences. Communicate openly and honestly about your own boundaries and limitations, and be receptive to your friend's needs and boundaries as well. Finally, be willing to adjust and renegotiate boundaries as needed to ensure a healthy and respectful relationship.