Sasuke has built some relationships over the series, but some of them were used to reach his goals.

Family

Sasuke developed a strong bond with his brother Itachi uchiha, but it did not last long when Itachi killed the entire uchiha clan.He always tried to surpass his brother and get his father' s approval of him being greater than Itachi.His mother always supported him and informs him that his father speaks more about him than Itachi.