For anyone not familiar DHV = display of high value.
It has the same importance as DHVing at a night club, etc. But I believe even more important when it comes to online game. You don't have other aspects of game that you could use that you'd have in person if you're cold approaching. You have your bio, photos and text. And competition is way more tough (it's pretty much a buffet for women) online.
So the biggest way to grab her attention and separate yourself from the rest of the competition is having value to offer. But most men don't display it or don't know how to.
Aside from showing a high value life in photos that you use for Tinder, IG, etc. You can display it over text.
My favorite DHV is sexual DHV. I paint myself as a sexual authority. My job is a writer. "What do you write about?" -- this is an easy bait. She'll likely ask what I write about. "I write about sex. I have a guide where I teach my followers how to give women the best oral. Up to 30 orgasms in a session. You?" -- Not only do I set up myself as being an authority on sex. I show her that if we meet, there's a chance that she will experience amazing sex and more orgasms than she's ever had. I also throw in another DHV "...I teach my followers" -- I am a leader. Men look up to me. I also have a following. You don't have a large following without high value.
I prefer to add sex into some DHVs because it is the easiest and fastest path to... sex.
You can do non-sexual DHVs, but you still have to sexualize eventually.
Some guys do it with money. The issue with that DHV is that women may use and withhold sex to obtain that value that you offer (money) for as long as they can. Essentially milking you for your value without giving up their one value they have. Pussy.
If my value is sexual, withholding their value (pussy) means that they do not obtain or experience my value.
Now how do you deliver a DHV? Straight up displaying your value comes off as cocky and even suspicious that you do not actually have that value.
Or perhaps even too eager or easy. She knows you are offering your value straight up. Which in a way is a DLV. If you give up your value to any girl. So easily. Without even a challenge or effort, is it worth it?
So what I do is bait them into it. I bait permission. So how I explained earlier in setting up my bragging essentially.
I can ask her "what do you do for work?" She tells you and usually they ask you. "I write" -- they will always ask me what I write about.
Now I can use a bit of curiosity to get her to chase for that information. If she begs you to tell her she cannot get upset if it is sexual. And she cannot accuse you of being cocky. She asked! She begged! So I can say "haha I don't usually tell girls when I first meet them. It's a bit... different." -- all girls will jump on this essentially begging you to tell them.
That's your permission to brag. That's your permission to even go sexual. You can add in a "you sure? It's a bit explicit"
You can brag all you want and go sexual now.
Then I go into sex. Oral orgasms. All that.

Does that make sense?

A few things that I am thinking about is how she wrote this. This is when you put a puppy down. I haven't received one of these in years. And I make sure that I am not treated like this. I can see her patting you on the head and calling you a good boy.
Don't reply for now. You need to reflect how you got here. Why is she sending you this? Why is she talking to you like a harmless child. Like her little puppy. At what point did she stop respecting you? Were you needy? (I know you. I know you usually can't wait to send shit to girls. You can be desperate and needy. And from this text I feel like you might've been). So first thing you want to do is step away from the phone and really go through the entire relationship. Identify where you went wrong and what you could do differently next time. You do your own reflecting. Do not feel the need to message her. You don't owe her that.

After you've calmed yourself and done your own reflecting. You've pin pointed particular situations where you went wrong. And why you are being treated like this.
You can send her a message. I'd honestly wait a week. This isn't exactly a saveable text.
I'd want to know exactly where you went wrong. What she is feeling and thinking. And not this woman talk that she just gave you. Not this "it's not you, it's me" nonsense.
Find a way to open her up. Accept her decision (she isn't expecting this btw).
"Haha no worries! You too!" -- send that. Nothing more.
With a bit of time, a couple weeks (there's a good chance it annoys the fuck out of her that you took it so well. I bet she becomes suspicious that you had another woman) and ask her honestly, tell her it's for honest feedback - it won't hurt you, where exactly you went wrong. You've done your reflecting so you have some ideas what happened. You can straight up ask her. Ask her for honest feedback. Tell her you want to improve with women and relationships for the future. Don't hold back. You can even threw her some easy ones. Tell her you know that he was too sweet or nice. Too needy. She'll probably, even lightly, agree with this. This will open her up a bit.
Getting this feedback and simply moving on will help you particularly.
Now what this could do is that she sees that you are not actually needy. You can walk away. You may even have another woman already. Women HATE when men are indifferent to them leaving. It bothers them. They need you hurt. Angry. Emotional.
When women threaten to leave or get another man, I don't play along. I don't engage. I don't get emotional. If anything I'll encourage it.
"well that's unfortunate! But you have to do what you need!" and move on. They NEVER EVER move on.