In life we are destined to meet other people, some may be friends, classmates or even enemies, some also will hurt us and bring out the best in us. It's part of life, they come and go, they will loved us or hated us, teach us or they will learn from you. You should learn to let, if they had forgotten you or ignoring let it be as long as you know is your heart, that you have been true to them since you met them. Move on you have more journey to come. Just be strong and live with love and trusting God.