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.
"Not that I have already attained, or am already perfected; but I press on, that I may lay hold of that for which Christ Jesus has also laid hold of me. I press toward the goal for the prize of the upward call of God in Christ Jesus." ~ Philippians (NKJV)