FWIW, it don't think you have a disorder at all - in fact, I think most of what you describe is completely normal as we seek our way through life, looking for partners to share it with, and moving into ourselves.

Thinking about love and what it means and is so like an engineer! Get to the root of it, understand the "problem" find a solution! There is no solution to love! Love is not a problem! It is there, always will be there, you just have to be open to it.

It's the way you feel around certain people that really really matters and has value. It is nice if they feel that way too, but not necessarily the crux of the matter.

I really think you're completely "normal" just a little lonely. It'll be okay. You'll get through this time.