I'm 25 and have attended 5 (all of which were FH's friends) all in the last year and another one coming up in 2 weeks that is his best friend's wedding... He's 27. The majority of my good friends are single. A handful in relationships. Can't wait until they start getting engaged though!
I've been to 5 weddings. I went to the last one with my ex and he proclaimed to his family during family photos that he wasn't going to marry me and he was confused why his aunts and mom wanted me in the pictures (we'd been together for 3.5 years, living together for 2.5). Safe to say he moved out of my house shortly after that.
I don't have any cousins or young family, so I didn't start going to weddings until my friends started. But it happens so fast! You turn 25 and your fridge is instantly covered in save the dates!
I've only been in one wedding so far, in 2012, and I was away at college for most of the planning, but I am a "matron" of honor at my best's wedding in September, and I am so excited!
Only 3, and they were all when I was a teen or younger. I'm almost 30 now. I will be attending a 4th wedding this June - my sister's wedding. This will be my first wedding as an adult.