Y.Zel.....I understand your pain. I am also separated from the man I consider to be my soulmate. He has moved on with another person, and yet my feelings have not changed after five years. I found another partner but the relationship was not the same, even though he was a good person. I lost him as well when he passed away.
You may have a strong bond with this man but he has chosen another person to be with. It is not uncommon for former lovers to continue to have feelings for each other. My recommendation is for you to move on with your life. Yes, you have to let go. You cannot hold back your growth and personal development waiting for what may never come. It is not a healthy choice to hang on, for many reasons. The best way to honor yourself is to move on, and if it is meant to be that your path crosses again with this man, then it will happen. But it may not even happen in this lifetime. It is common to come in contact with the same souls in different lifetimes. I believe that happened between myself and my last partner.
To connect with your guides you will need to shut out all distractions. Meditation is a good way to focus on just being and breathing. When you can bring yourself to a calm and silent place, ask your guides to present themselves to you and that you need their help. They will manifest themselves in different ways. You may not hear a voice but you may get a feeling or an idea of how to proceed. It may not happen immediately but the signs will come, perhaps even in dreams. Meditate every day. You can also pray to the angels for guidance. Subtle signs will come to you. Pay attention and realize that something slightly out of the ordinary could be a sign.
I wish you peace and happiness.