Am I overreacting?

So my boyfriend and I have the same birthday today. We are in a long distance relationship, 8 hours away from each other. We didn't have the option to see each other this weekend or today. He hasn't said happy birthday to me at all today. I said it to him. He hasn't texted me back today, or called, or even sent flowers or a card or anything. But I know he checks his phone because he read receipted me. He hasn't gotten me anything, nor has he ever, even when he lived close to me.

This is our third birthday together as a couple. He won't even post a picture of me on his Instagram for our birthday, but he will when it's his friends, brother, sister, mom, dad, etc. I got him a bunch of thoughtful, sweet gifts that I know he'd love and sent it to his house. It says the package arrived today, but still absolutely no word from him. I know he is on his phone multiple times today as I can see him liking things on Instagram, and I know he's going out with his friends today. I feel like shit and now I'm crying so hard in bed. I have bad social anxiety and it's hard for me to make friends and no one really hangs out with me ever so I haven't gone out today. I feel so pathetic. Am I overreacting? Why is he being like this? What should I do? I feel so insignificant in his life. 😔

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