It doesn’t have to be a formal evocation. I am just suggesting a method in which I have had some limited success with, which might be worth looking into.
Hopefully others can chime in with their own ideas about baking a cake with no flour, sugar, or eggs. 
Thats a question I dont know the answer to.
I would assume with practice you could get the manifestation of your spiritual lover, through a base, quite easily. Especially if she is always by you, it should be ‘‘easier’’?
The physical manifestation of spirits for a prolonged time is a touchy subject, and would probably require a decent amount of skill and ability to draw up reserves of power. Things just don’t pop out of thin air, ya know?
In an earlier thread Lady Eva quoted these:
That Anon account has a lot of topics you might be interested in reading. Especially the one about working with Tuplas and Thoughtforms. Before you get up in arms about ‘my lady isnt a throughtform’ you could still apply the techniques to spirits, probably easier, and with some creativity tweak it for your own. IDK. It could be a fun rabbit hole to explore.
Good luck!
You should give it a try, and with a stressful environment, no wonder things are ‘dull’ for you. Should try to reflect and see how you can make it better for yourself. You deserve more than being surrounded by stress 24/7.