Can you all explain why am I feeling so much panic about turning 25 and feeling so old?

Idk I am 24 and my 25th birthday is just 7 days away which is on 22nd December and idk why it feels as if time is running out. Its exactly at the middle of 20 and 30. Idk I am cold approaching women too but I already worry whether I am past the age at 25 to cold approach or socialize with women. It definitely feels like my youth is over now. People often expect 25 to be a very serious and matured age. I feel too much FOMO for missing out in my teen years and some of my early 20s due to shyness and developed trust issues due to bullying in school. Idk why I am feeling soooo old already 😢😭. I am in a weird transition stage as I am done with my MBA but job searching for months after I was fired. I have an alumni meet in my campus on coming Saturday which is just 2 days before my 25th birthday. I really wanna visit it and talk with the women from my year(mostly 23-28 age range) and also the MBA junior batch ones who are in the 21-26 age range and enjoy the last 2 days of me being 24 and happily enter 25 😭 but I am worried whether I should go for it or not as I just freshly graduated and whether people will judge me as I am job searching and still casually socializing there especially with women. I wanna say one last goodbye to my campus 🥹 as the convocation happened in a convention center instead of our MBA campus. Do you really feel 25 is past the age for still enjoying life, socializing and chilling too? Should I visit the alumni meet?