There's another thread about MP replying PM in terms of how fast how frequent etc....
I think a lot of us just overthink too much and the lightning speed of modern day communication (email / text / chatroom) doesn't help. A lot of people send a text/email to someone and after 5 min of not getting a response they start thinking why they're being "ignored" LOL.
Everyone, chill. Relationship, friendship, business responses or any great communications happen when both sides are being respectful and more importantly, patient and keep a +ve attitude. Stalking / repeating sending text / email will only cause more harm. If it's meant to happen it will happen. If it doesn't happen after a few (gentle) trials, you move on.
The fact that you're not the first priority of the other side doesn't necessarily mean they don't like you. They might be just busy or unintentionally skipped that email. But even if that's the reason and at the end you two's path don't cross, that's life.
Just don't magnify everything in our minds. it's not the other people, it's us who add pains to ourselves.