The Weasleys

Harry choose to stay the Summer with his favourite family in the Wizard World the Weasleys. They are like a second family and to be fair the only real family he had.

He could go on a date with his Girlfriend Ginny, or spent time with his best mate Ron or even one of the other Weasleys like the Twins and he wouldn't have to return to the Dudley's for the last summer.