Not everybody is going to like us and even our best friends and closest relatives get annoyed with us from time to time. Most people get over things given some time and space to cool down. Children forgive and forget very quickly. Rarely are interpersonal conflicts entirely one-sided. Sometimes another child may simply not like them, in which case the best choice might be to give up on that individual or group and move on to other mor accepting friends.
Some children are easy targets for teasing and exclusion because of the way they look or behave.
These kids do not pick up on social cues that seem to come naturally to others. Try to be objective and think about whether there is something he or she could change or do differently that might help. Input from teachers or other neutral adults can help here. Sexually oriented teasing and harassment is very real at school and in the community. Students should understand that this is not acceptable and could be cause for suspension.