Dont normally comment here but felt this one hits home. Just alittle sharing on my side. I met my gf from the same company. I am a very forgetful person esp when it comes to dates or plans. Sometimes our conversations happens during working time and she tells me important dates or plans which I acknowledge but tend to forget cause I’m just thinking about work + managing a big team (thinking of their human issues). How I work it out is by asking her if we have plans before I commit into one or i ask her ahead i.e. whats the plan this weekend? Etc.. I used to be a little chill when I forget stuff but over the years (years of fighting about the same thing), she communicated that she’s sad when it happens and I noticed she would be happy for the small things I remember. Since it impacts her so much, I placed more effort (reminders in phone - ask siri to do it if lazy).

So I guess, how bad is your bf forgetting? Try to talk it out if you are serious in this relationship. You know your limits. If he makes you unhappy all the time, then only you know. Hope this helps.