Boyfriend didn't wish me on my birthday. Should I dump him or should I forgive him?

So my boyfriend didn't wish me on my birthday even though he knew when my birthday was and he even went disappearing on me and didn't call me for weeks. And then now suddenly he is flooding with calls. I'm really confused. What should I do?

Boyfriend didn't wish me on my birthday. Should I dump him or should I forgive him?
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