One of the significant effects of technology on human relations is visible in friendship. Positively technology through its digital spaces is facilitating friendship that is instant and beyond the limitations of time and space. However, such digital friendships that operate through social media often suffer from issues of trust and sustainability. To resolve this predicament, we need to pause and reflect on how digital friendship can be reframed to improve its sustainability in a practical manner. The primary purpose of this article is to examine how helpful the early Buddhist concept of mittatā (friendship) is in sustaining friendship in the digital age. The article begins by eliciting the moral challenges people encounter in online friendships. The objective is to highlight the need for a more vital concept of friendship, such as the early Buddhist concept of mittatā, that can mitigate the moral concerns in digitized friendship, making it genuine and sustainable. The subsequent part of the article offers an overview of some of the significant theories of friendship upheld in the West and examines whether they can support the sustainability of a digitized friendship. The objective is to reflect upon the lacuna in the practice of such ideas of friendship in the contemporary digital age. To replenish the lacuna, the following section articulates the early Buddhist concept of mittatā as a noble concept of friendship that can be morally relevant and sustainable in this digital world. Based on the philosophical study of the early Buddhist literature, the present article investigates how helpful mettā (loving kindness) in this society to sustain a trustworthy friendship. It proposes an ethical and noble way to nurture and savour an honourable friendship relevant to the digital era by inculcating specific virtues advocated by the Buddha.