I have a friend like that. Whenever we meet we have fun, but she never contacts me. She tells me that's just how she is with everyone, and that she really likes hanging out, she just doesn't initiate, which is fair, but it still feels like she doesn't value me, no matter how much I logically know otherwise.

These days I try to override the feeling and initiate first, because I know that she really does want to hang out, but the feeling is deeply ingrained and hard to shake.

What I'm basically saying is that maybe you should try a bit more, because this way has certainly lost you a few friends over the years. Maybe it works for you, though, no judgment.