If a guy forgets your birthday is this a deal breaker?

Anonymous
I already knows he's a jerk but this was just lower than low! Thought we could remain friends. This guy I have been casually dating for 6 months flat out forgot my birthday today. We have known each other a year, talk often, go on dates, etc. I always get a text on holidays but today nothing. He had time to post on Facebook though which tells me that he doesn't care and doesn't consider me a priority.

I'm really hurt and torn but I know he doesn't care
So no point in even giving him space in my head or saying anything.

He knows how important my birthday was to me and he decided to go away this week
Instead of doing something for my birthday.

Question here is: next time he texts me do I ignore him
Or call him out on his lack of caring? He will just lie to me, so
I think I should just move on, ignore him and say nothing.

He will get the picture.
Updates
+1 y
****update

He apologized and said he was traveling for work and bla bla bla. (That's all I hear because it's always a damn work excuse) then wishes me a happy belated. I know it's bs but he's not my boyfriend so all I'm saying is thanks.
If a guy forgets your birthday is this a deal breaker?
2 Opinion