Lovelife;
You do care. Look at your screen name!
It's clear you are hurting. I'm sorry.
I cannot tell you what it is about those relationships. But, sometimes, one person wants more out of a relationship than another. Like everything else, it's one day at a time. Accept it for what it is, not what you want it to be. And work at what you really want for you.
In the meantime, be sure to take care of yourself physically, mentally, emotionally and physically. And if you need to have a med check, please do so. You do not have to be miserable. You can reach out for help with a counselor too.
Shalom!