How do i know if i was right for him go when i my heart never really let go of him no matter how n what i try?

You had your reasons to let go. Stay true to those reasons, and to yourself as a person. It is incredibly hard for our hearts to let go, especially if it was someone we connected with on a deep level. But when you make a decision, stick to it and honour it. In the long run, that is the only way you can move forward. If you keep revisiting your decision, the only thing it will bring is more pain and uncertainty. Clinging on to something will never be the right thing to do. Let go, find yourself a distraction until your heart calms down. I feel for you, and wish you start feeling better soon.