I can't find my EC2 instance in my dashboard

My friend created an EC2 instance and shared it with me (I received an invitation email from AWS when he shared) and I have been using it to host my blog. However today when I logged into AWS using the same email that my friend shared the EC2 with me, I cannot see that EC2 anymore. I have looked in all US regions. I am still able to ssh to the EC2, I just can't see it in the dashboard. What should I do to show the EC2 in my dashboard? Thanks