Plz guy advice? need bad??? >.>?

Ok well my brother has this friend n he added me on myspace n i started tlkin to him n wut not u no gettin to no him. well we get along rly rly well n he tol dme he likes me then my bro was like do go ask her out n i guess he told him he doesnt want a gf rite now or sumfin n I like him back tho... ttt the thing that bothers me is hes 14 and im 16... thats the only problem he doesnt rly act like a 14 yr old guy usually does. hes rly mature fer his age n my bro keeps tellin me he wants me to go out wiff him but then another problem hes my friends ex n she still rly likes him n yeah... uhh ne advice on if its bad cuz hes 2 yrs younger to like him n about my friend? good or bad idea?