My 3 year Cousin doesn’t leave my lap and cries when I left him.?

dont worry bout it. ur bro is just normal. many kids r like dat. wont leave der moms at all even 5 yr olds. dey just want attention. datsy dey dont leave d person dey like. not even for a while. dey'll grow up soon. u just hav to give sum time. conc on ur exam. all d best.