I totally understand about the feeling of "bereavement," lovemabub. To my knowledge, people often go through the same stages of grief when they lose or feel they've lost a relationship as when they've actually lost a person to death. It seems to me you know it's not death, that's why you said "living bereavement." But, no doubt, one can still sense a void.
IMO, posters here having given you very good ideas. And I'm glad you've decided to rethink your attitude and are making plans to alleviate the problem. Best to you, moving forward!
Army horses loose on London streets