1) First of all,change your attitude towards your aunt...Even if she is jealous...treat her well... 2) You can not change other's feeling at once but you can try to influence other's by your positive attitude...Be positive... 3) You look so desperate to make your cousins feel positive about you...so,it is not the way...by publicly anouncing about aunt's jealous,you are trying to degrade your relationship with them...be brave and call them and share your feelings... This is not the right place to work on your relationship...