I think you mean solipsistic.
Main Entry: so·lip·sism
Pronunciation: 'sO-l&p-"si-z&m, 'sä-
Function: noun
Etymology: Latin solus alone + ipse self
Date: 1874
: a theory holding that the self can know nothing but its own modifications and that the self is the only existent thing
- so·lip·sist /'sO-l&p-sist, 'sä-l&p-, s&-'lip-/ noun
- so·lip·sis·tic /"sO-l&p-'sis-tik, "sä-/ adjective
- so·lip·sis·ti·cal·ly /-ti-k(&-)lE/ adverb