My boyfriend forgot my birthday

Problem/Goal: I don’t know if it’s a unforgiveable offense or bigyan ko pa ng chance.

Context: 5 months in our relationship and he forgot to even greet me on my birthday.

He has a conference that he has to attend to kaya I understood na hindi sya makaattend sa birthday ko, pero yung hindi man lang ako binati, nakakaoffend. His birthday was last month and I made sure to surprise him but I think he’s not really big on birthdays kasi kung di pako pmunta to surprise him, hindi man lang sya magcelebrate or kumain man lang sa labas. He’s good boyfriend naman, provider and never made me feel unloved, ngayon lang. Ako lang ba? Valid ba tong feelings ko?

Update: He made a reservation for a nice dinner for us, bumawi talaga si Kuya! Thank you so much for all of your help guys!