Dear [Friend's Name],

It was great to hear from you! I've been doing well, just keeping busy with work and spending time with family and friends. How about you? How have you been? I loved hearing about your recent trip, it sounds like you had an amazing time. We should definitely plan a trip together soon; I miss our adventures together. Let me know when you're free so we can start planning. In the meantime, let's catch up soon over a video call or maybe even in person if our schedules align. Can't wait to hear from you!

Take care,
[Your Name]