You shouldn’t be emotional or tell her how you feel. I think you need to be a man about things, and have a bit more confidence. Your world does not revolve around her. Find your focus elsewhere, tell her about that focus, what you are passionate about. It cannot involve her, it has to be something else. With the messaging thing, just adapt, if she doesn’t reply to a certain type of message then don’t repeat it. No stupid memes please. No messages directly after a date. The dates need to be a bit more crazy too, you need to bring out the rebel in her. Find a common interest or hobby, reason for meeting regularly without you having to chase all the time.