Love this description!

I don't know about the falling in love with the idea of falling in love with the idea. . . but it does sound like you are spending too much time in your head and not enough actually interacting. Remember, in your head, you have that insomnia problem above!

You say you are not acting out these things; that is good but doesn't help you in any way to solve the problem of being too much in your head and imagination and not enough engaged in actually listening to what another says and comparing it to what you think they would say/be like and being surprised they are/are not like what you think and telling them what you thought they'd be like, etc. You have to practice engaging others; you can't fall in love with another unless you literally get to know that other and you can't get to know another until you talk to them, just you and them. Everything else is your imagination and an idiosyncratic idea of what that idea would be like if it were to play out.