wildflowers, some excellent points there.
One of the advantages to polyamorous relationships is that one person isn't pressured to be the "be all and end all", to have to fulfill every need of their partner. Nearly everybody is going to come up short on that one.
So, rather than focusing o what is not there, how about focusing on what IS there - the strength of what you have, and all the ways in which you are fantastic together.
Sounds easier said than done, but it IS possible, believe me.
"Listen, or your tongue will make you deaf." - Native American Proverb