Most Helpful Guy
How many times has he forgotten your birthday? if this is the first time then please I hope this is not a reason for you to break up, even otherwise this alone shouldn't be a reason to break up with him. Please don't do that.
I know it can be annoying, have you ever tried to bring this up to him? have you pointed it out that this is bothering you?
Most Helpful Girl
Oh hell, no.
Well he forgot your birthday so now he has to make amends. You can make him do anything that you wish under the pretext that he needs to make up for his mistake.
Ask him to cook for you or take you out to a holiday spot or anything else that your heart desires.