What should I do after my boyfriend only said ' Happy birthday' and nothing more?

Raquellexxx
My boyfriend always says he loves me and wants to spend his lifetime with me. We are in a long distance relationship and I feel like I have made lots of sacrifices and he still does things even though I have asked him not to.
On my birthday, I didn't expect gift but at least wishes from him manifesting his love making me special on my birthday. In return, while EVEN STRANGERS wished me tons of things, my boyfriend who actually got the gift of the gab creating long posts on social media, only said "Happy birthday'' plus emoji which made me feel awful. I am not materialistic but although I have sent him present and he didn't, now he didn't even give me a single wish, care, and "I love you". When I told him, he was so surprised acting like ''2 more words mean nothing'' making me feel as if I'm petty and ungrateful telling me things like ''Sorry for not making you happy on your b-day but he didn't mean that it was kinda sarcastic as if he got MAD AT ME? When I said that he made me sad he only wished me a goodnight and almost hung up. He ruined my special day and my notion for him.
What hurts the most is that initially, he seemed different - not a womanizer, kind, thoughtful, caring. When we talk, everything is fine - we laugh, talk sweet things, share. But BEFORE the conversation it's me waiting and staying up late pretending that I am not sleepy because I am happy when we talk. Although I am working now and he is not. Most of the times when we talked, he was playing games saying that he can still talk to me. I have asked him just to wake up a bit earlier so that we can have more time to communicate. He said it was difficult to change his sleeping schedule and he will try but that is just not happening. But the simple things I wanted didn't happen.. and they are actually not very simple. Should I finally leave him after this situation, the lack of understanding plus his behaviour because I know that he won't say sorry and even text me again until I text first?
What should I do after my boyfriend only said ' Happy birthday' and nothing more?
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