So my initial reaction to this was "who gives a sh*t"? Once you are in the real world of work you will be socializing with people much older than yourself and several years into your career you will be socializing with people who are much younger than yourself. Look more at mindset than age, besides 2 years difference is absolutely NOTHING lol.

A point that I haven't seen addressed in other comments is the cost. If the additional 2 years ends up costing you a lot more money then I would vote against it. If you are in a country where tuition/boarding are paid then that isn't a factor to consider.

I'm 35 and I hang out with 18 year olds because they're about the same maturity and energy levels. People my age are always complaining about new tech and talking about retirement.

Last year was weird, but did you have trouble socializing with 3rd years last year when you were a freshman? Did you have trouble socializing with seniors this year?

Sure, an 18 year old has 10% less life experience than a 20 year old, but as an 40 year old, I can say almost all of you youngin's haven't got much life experience at all, 90% of nothing is nothing. ;p

Some age spread in dorms is expected. Some people skip grades and go to college early, some people take a gap year or two, and there are usually some upperclassmen in the same residence. I wouldn’t worry about it.

If you have to ask. I would say yes...