i think u felt lonely coz u still had feelings for the girl, now that its all good and ur over her u wont feel as lonely
surround urself with new girls and u wont be lonely nemore! maybe even make her jealous in the process too
I feel so lonely right now I wake up any noone is in the house... All my friends are out or studyin and I just broke up with my girl (which was good yet sad at the same time).