Am I just getting old?👵🏼

I'm 22 and there's a girl in my young women's bible study group at church who's 18. Well recently she started dating some guy and she WON'T SHUT UP ABOUT IT. She'll talk about their wedding plans even though they've been together for literally two weeks and in general she just acts like she's the first girl to ever date someone and it's annoying. I know, I know, I was 18 once, too, but I don't remember acting like a 6th grader when I was with any of my HS boyfriends. Is that genuinely annoying to other people or am I just acting like a bitter old lady??