Age group

Few mins ago I was chatting with Beng (a friend of mine) I told him that one of my friend transfered to other school because of the age group problem, then Beng told me that he must be a stupid childish boy which I find that it is quite true. I strongly believe that personality mismatch is the main reason for people cannot get along with each other.

Hmm... At this May I might be studying with a group of people who are older than me so ermm.. can I get along with them?