Consider seeing a couples therapist who could facilitate communication and help you address concerns. Check out https://www.psychologytoday.com/ to find the appropriate couples therapist.

Cancer Care (https://www.cancercare.org/) also offers resources such as free, professional support services including counseling with oncology social workers and online support groups for spouses and partners of people with cancer. Their website provides extensive information on topics like intimacy, relationships, and caregiving.

https://www.aftercancer.co/ offers a comprehensive list of online resources for all topics and issues related to sexual health, cancer, intimacy, side effects of cancer treatment and health and more.