Make the distance part of the story, not the only thing the proposal says.
Plan the Timing Together
Time zones, work schedules and privacy matter. Choose a moment when both of you can focus. If you want an element of surprise, surprise them with the content of the proposal rather than calling at an inconvenient time.
Use Shared Long-Distance Memories
Mention late-night calls, planned visits, missed moments you handled together or the way you stayed connected during difficult periods. These details show that the proposal comes from the reality of the relationship.
Combine Voice and Written Words
You can say the proposal on a call and send a Love Card immediately after, or send the card first and then call. Using both formats gives the person something to keep while still allowing a live emotional reaction.
Talk About the Future Carefully
Long-distance relationships often include plans to close the distance. If those plans are real, mention them. Avoid making promises about dates or moves that have not been discussed.
Use these ideas as a starting point, then add your own memory, honest reason and clear question.