I'm sorry that you are so frustrated.
Sometimes the best thing to do is just let things go until calmer, clearer heads prevail.
Quite often, the best response is no response.
I have been battling this with my bf for 2 years.
I've come to accept that it's not personal, he's still thinking of me when he doesn't message. He's introverted, doesn't have alot to say and doesn't like talking for the sake of talking but he tries to reach out, because it's important to me.
And, if anything, absence makes his heart grow fonder. It really does. The longer we go without communication or dates, the more excited we are to see each other.
Have faith. And try to relax.