If i'm not mistaken garra, temari, and kankurou are all siblings. If that is true then how come in some of the flashbacks they show garra always being alone, u would think that he would b around those two.I mean he should have some1 2 grow up with and these lonliness issues that he has should be non existent. And also y does garra live with his aunt, and where are temari and kankurou at during this time.

Probably because his dad was the kazekage he either didnt want to or couldnt take care of him, and his dad ended up trying to kill him because he was to powerful. He probably didn't want his other children around Gaara, maybe.

Probably Gaara as all alone because he was way too dangerous and everyone was afraid...and his dad considered him a weapon. Virtually that was his destiny since birth. Remember that Gaara's mum was made a sacrifice for the demon...so we can assume that his dad hated Gaara deep down for this...and tried to protect his other children....

i love gaara so much!!!

In one of the flashbacks, they show Kankurou and Temari standing close to the Kazekage, and Gaara standing separated from them....basically this shows (symbolically) that the Kazekage considered Gaara an experiment rather than a part of the family, and I wouldn't be surprised if he decided Gaara had to live separate from his brother and sister (Gaara was considered too dangerous to be around)