My LDR boyfriend forgot my birthday?

In a LDR relationship for 6+ months. My “ boyfriend “ has a lot of issues in his personal life ( pending divorce, custody battle ) but evidently I stuck with him.
I know he has a problem remembering dates , so I reminded him of my birthday two days before. Asked him if he has a reminder set up as well. Told him I don’t want anything but flowers will do. I didn’t want him to not wish me because this is my first birthday together and he’s my first boyfriend as well.
Yesterday was my birthday. I waited the whole day for a single wish. Whereas he proceeded to call me several times during the day and talked about every other thing but wish me. To top it off , he didn’t get me anything either.
I’m feeling very upset about it still. He insists that he had the reminder on the phone which didn’t alert him. This is all starting to sound like a big excuse.
If this is the start of how the rest of our life together gonna be, I don’t want it.
Should I break up with him?
My LDR boyfriend forgot my birthday?
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