I Hate Being Forgotten

Hate it. I know that sounds selfish but for the longest time I was forgotten about by friends, family, etc. My bf remembered my bday after I told him when it was. Now he's throwing something for his best friend soon. I get it, we've only been dating for 10 months now and she's been his best friend for years. Yeah, it's just a bday and he does amazing stuff for me, but why do I feel so... jealous?