He probably will invite you somewhere if you stop calling him totally, rarely text him back, and avoid him when he comes over for son. It may take a week or more. If he has issues with control or pressure, he sees invitations as controlling. He is going to ignore your birthday or do something weird and passive aggressive that will make you cry. Believe it and prepare mentally. You could free yourself from the whole birthday drama by announcing plans that he did not suggest that could in no way, shape, or form include him. Maybe a special night out with parents for only you or friends for only you. Or a play he could not attend because someone else gave you tickets and was taking you (clearly not a date, but clearly exclusive). He is already messing with you about it, seems like. He needs to see that you make your plans ahead of time so in the future he can commit ahead of time or not. But don't point this out to him. Just do it in the spirit of moving on for you.
