Why dose he love her shes mean?

hi im 14 my boyfriend broke up with me a week ago he claimed that he felt weired around other girls and that he only feels for this other girl shes 15 her name is jess and to be blatantly Honest she a slut she loves all the attention and toys with boys hearts she acts like shes better than every one she has a face slapped in makeup with draw on eye brows and she is pretty but she is so nasty and mean and i cant stand to be around her i just don't get how he can love her when shes so horrid and when all ive ever done is love him