In this situation, it was not helpful or appropriate for you to tell your friend to move on and find someone else to replace their loved one who passed away. Grief is a complex and personal experience, and it cannot be easily resolved by replacing the person who has been lost. It is also not fair to compare someone's loved ones to the person who has passed, as it can be hurtful and dismissive of their feelings.

To address this issue, it would be best for you to apologize sincerely for your hurtful words and try to understand your friend's perspective. It may also be helpful for them to seek out resources for supporting someone who is grieving, such as therapy or support groups, in order to better understand how to cope with their loss. Additionally, it may be helpful for you to take some time to reflect on your own communication style and try to find more effective ways of expressing your thoughts and feelings in the future.