If they don't care enough about you to be upset about loosing you, then why waste the time fighting for them. Don't loose yourself or disrespect yourself by continuing fighting, all your doing is allowing them to win. Be strong enough, brave enough, and smart enough to walk away. Be sure to walk away with your head held high... you don't want your tiara to fall off, princess(;
If someone seems to not care about hurting your feelings - you can decide to forgive them. Move on because any grudges you carry will hurt you more than them. Use that energy to plan and prepare for the life you want to live and dream of. Remember this...you will want forgiveness too one day. Don't let the little things hold you down or make you always upset.