Dear Paulina, I hope this can help you

Clin Child Fam Psychol Rev. 2014 Mar;17(1):1-18.

Growing up wired: social networking sites and adolescent psychosocial development.

Spies Shapiro LA, Margolin G.

http://www.ncbi.nlm.nih.gov/pubmed/23645343

I've written some articles related to that. You can also find other references to this field from these publications. Best, Arniika

Kuusisto, A. (2010). Social networks and identity negotiations of religious minority youth in diverse social contexts. In T. Reynolds (Ed.) Young People, Social Capital and Ethnic Identity. London: Routledge. [First published as an Ethnic and Racial Studies Special Issue]. (ISBN 978-0-415-55211-0)

Kuusisto, A. (2005). Methodological issues and challenges in studying young people’s religious identity. In Helve H. (Ed.). Mixed Methods in Youth Research. Helsinki: Finnish Youth Research Network/Society, 197–212. (ISBN: 952-5464-22-9) www.nuorisotutkimusseura.fi/julkaisuja/mixedmethods.pdf (whole book freely downloadable from the website)

Kuusisto, A. (2011). Growing up in Affiliation with a Religious Community: A Case Study of Finnish Adventist Youth. Research on Religious and Spiritual Education, 3. Münster: Waxmann. (ISBN 978-3-8309-2498-2)

Kuusisto, A. (2006). Young people’s religious minority identity and commitment: Case study among Adventist youth in Finland. In Tirri, K. (Ed.) Nordic perspectives on religion, spirituality and identity. Yearbook 2006 of the Department of Practical Theology. Publications of the Department of Practical Theology, 110. Helsinki: University of Helsinki, 131-145. (ISBN: 952-10-3301-0)

Kuusisto, A. (2007). Religious identity based social networks as facilitators of teenagers’ social capital:  A case study on Adventist families in Finland. In H. Helve & J. Bynner (Eds.) Youth & Social Capital. London: Tufnell Press, 87-102. (ISBN 978-1-872767-77-2)

Kuusisto, A. (2005). How does school social context affect religious minority identity? Exploratory study on Adventist young people in Finland. In Kiefer, S. & Peterseil, T. (Eds.) Analysis of Educational Policies in a Comparative Perspective. Schriften der Pädagogischen Akademie des Bundes in Oberösterreich, 30. Linz: Universitätsverlag Rudolf Trauner, 73-87. (ISBN 3-85487-933-4)

Dear PauIina, I  link a website of an argentinian researcher who works in this topic.

http://live.v1.udesa.edu.ar/Sobre-San-Andres/cuerpo-docente/Detalle-de-profesor?pid=47864

I hope that be usefull, best regards!!! 

Thanks everyone for such good recommendations.

Hi Paulina,

There is some tools you may find interested and related to your topic:

- My Life in School CheckList (Arora & Thompson, 1987)

- Social Inclusion Survey (Frederickson & Graham, 1999)

- Social Support Scale for Children (Harter, 1985)

- Loneliness and Friendship Qualities Scales (Asher, Hymel, & Renshaw, 1984; Bukowski, Hoza, & Boivin, 1994)

- Asher Loneliness Scale (Asher et al., 1984)

- Social Networks and Friendship Survey (Cairns and Cairns 1994)

- Psychological Sense of School Membership (Goodenow, 1993) 

This article, for exemple, is interesting and even if it's about autistic children, you may find some elements which could help:

Kasari, C., Locke, J., Gulsrud, A., & Rotheram-Fuller, E. (2011). Social networks and friendships at school: Comparing children with and without ASD. Journal of autism and developmental disorders, 41(5), 533-544.

Finally, this tool is not exactly close to your topic but might be interested: Self-Perception Profile for Adolescents (Harter, 1988) 

Enjoy your research!