Bottom line is...no, you're not too young. Heck, if you had the money...even a Ferrari wouldn't be out of line. You've earned what you're able to afford. Enjoy it while you can. At least until you're paying for your kids college tution, or fiance's 2.03 carat ring. Don't ask me how I know.
Maybe she's making references to your age bcuz she's impressed? ;)
**I'm such a bad influence** Haha