When you like a person, you constantly think about them.
You imagine yourself in a fantasy, where you go places and do things together. He/she is romantic, loving, kind, and does exactly what you want when you want it.
This will allow you to understand what you want better and know what to do in most of the common situations.
You’ll probably still feel a bit hurt, but it won’t be the end of the world because you’ll have a life outside of the relationship.
If that is the case, then of course the relationship would feel like the center of the world to you, as you are deriving most of your identity from your partner.
This is where an intuitive mind trying to analyze tons of possibilities becomes extremely harmful. The other thing that happens when you think about your future together too much is that you are analyzing too deeply down one branch of the possibility tree.
Other parts of your life start to shrink because all your thoughts are focused on how good it would be together.
You have something he/she wants, and he/she has something you want (sex, companionship, etc.) As a result, the both of you benefit each other.
Over time, as the two of you trade more and more, you realize that it’ll be more efficient if you just stayed together. When you don’t really know yourself and don’t have much to offer in your relationship, that’s when you become “desparate”.