Why is everybody getting married???

Okay so over the past 6 months I have seen WAY too many people getting engaged! Normally I don't pay much attention to it because I mean usually they're not my age and I'm not really close to them. BUT there's a group of friends that are a year younger than me and who went to my high school... and four out of the six of them have gotten engaged over the past 6 months or so! Personally, that freaks me out because I can't even imagine settling down and getting married at this point in my life! Most of them have been dating their boyfriends for a pretty long time, but one of them is engaged to a guy she met in college. I don't know why this is so crazy to me, but every time I think about all of them getting married and realize that they're only a year older than me, I panic and freak out (for them and for me). Anyways, so happy for all of them because they're all super cute couples and sweet people... and more power to them!