Marriage Material

I was having coffee with a girlfriend of mine, who is from the States. She's in her third year of college and her boyfriend is finishing off his last year. While in Scotland C. Has found the adventurous spirit and energy she has been lacking all this time. He boyfriend on the other hand is one of those 9-5 types, who wants to climb the corporate ladder and then get into politics (not that there is anything wrong with that). He gave her an ultimatum (and you thought girls only did that) either she chooses him (and his boring ass life) or her new found philosophy. It seems that he sees C. as the person he marries (so if she says she chooses him she is basically engaged). Which brings me to my next point, she can't be engaged because she's younger then me. Marriage doesn't scare me, i'm used to married (and divorced) friends, the tricky part is all of them are older then me and here i am talking to my friend and she is younger then me and seriously talking about marriage, 2.5 kids, and dog. And frankly that scares me.