Loneliness can be associated with a range of negative feelings, such as anxiety, fear and helplessness. It can lead to a loss of confidence, which results in an avoidance of social situations, networks and relationships, making the experience of loneliness even more intense. Sometimes people blame themselves for the feelings they are experiencing, which affects their self-esteem; sometimes people cannot see an end to their loneliness, which makes them feel powerless.
Certain situations, such as moving to a new house/school, might mean that you are separated from your friends, which can lead to feelings of loneliness. Feeling different or marginalised and/or feeling nervous or anxious about interacting with people can also have the same effect. It is possible to feel lonely, therefore, when you are surrounded by people but are not connected to them. You should seek help if you are feeling this way - talk to a teacher, parent, counsellor - or try following the steps given in 'Meeting new people' to help improve your confidence and support the establishment of a social network.
If you are experiencing loneliness then Childline has some advice/support that may help you, find out more here.