My partners mostly don't need this, which is good for me because it would be an artificial construct--I mostly don't feel it and in my personal ethos it would be wrong to, so if I did feel it I'd want to stamp it out. My love for them, to be healthy, must mean that I want the best for them, even if that best isn't me.
There are other ways to say I value the time I spend with my partners than by expressing envy of the happiness they experience with other people (which is again good because that's not what I feel or think). For example, I express my happy anticipation of an upcoming visit, or that it's been too long since our last visit.
The last thing I want is for my partners to feel anxiety that I might leave! Why would I want them to feel anxious? I want them to be secure in my affection and in their place in my life.