Once a month would be fine if you are her only friend. When people have family and jobs and hobbies and other friends, once a month might not be reasonable. Like if she has other friends besides you, she’d need to see friends every weekend and it’s just not realistic for a married employed people.

Have you tried to develop hobbies that would take your time and energy and you won’t need as much from other people? Drawing? Knitting? Photography? Cooking? Anything?