Being a medium is about communicating with loved ones in spirit - and sometimes when they're preparing to die and are in a coma or are unconscious, as the spirit has sort of 'left the body' in a way at that time, as it nears physical death.
Being a psychic means having the ability to connect with the energy of people, places, events, etc. past, present and potential future. So in theory, what you would be asking is to have a psychic tune in to the energy of the person from whom you're estranged to see what's going on with them.
There are countless psychics who will do this, but I think it is highly unethical, to say the least. It is psychic spying, it invades and violates that person's privacy, and we should never be looking into the heart and mind of another without express permission from that person.
Estrangement happens for so many reasons, and sometimes it's just time to move on, or for people to go away and learn things or walk their paths in ways they couldn't do together. What's most important is in determining what you can learn about yourself because of it. What are the insights that are coming up, the feelings, etc.? What needs healing in yourself? What can you take away from the situation? How can you use the relationship AND the separation to your benefit, because certainly, there will be some learning and insights and benefits to be gained from the experience.
And sometimes - usually - these kinds of separations also come with lessons about acceptance and letting go.
I don't know if any of this is helpful, but I hope so.