Hello @tracie2,
I am so sorry to hear about the loss of your partner. Sending love and light your way as you honor and recover from his passing 
Benjamin shared some wonderful advice, and I agree- the belief of spirits and ghosts is not universal for all witches. How you interpret and choose to interact with the souls or presence of those who passed is something you should explore and define in a way that resonates with you.
That being said, there are many here who have shared their experiences talking and interacting with spirits. I am happy to point you in the direction of those conversations in hopes that you may find the advice you are seeking in the experiences of others:
- Haunted spaces, bad spirits, negative energies
- Working Through the Veil Between the Worlds
- Pluton- God of the Underworld
- Prayers/Rituals for the Departed
- Death and the Afterlife
Personally, if you find the presence of your departed partner to be wholesome and reassuring, I suggest finding ways to work in harmony and maintain the bond if it brings you happiness.
However, you feel these interactions are more haunting and are bringing you stress, you may choose to instead cut your ties and cleanse in order to move on:
I also second the advice Benjamin shared- if you are truly struggling to move forward, a health care specialist may be able to help you find your way.
Wishing you the best of luck as you discover your unique path forward 
Blessed be!