好似: to seem, to be like...
成心: intentional, deliberate, on purpose...
突然: sudden, abrupt, unexpected...
怀念: to cherish the memory of, to think of, to reminisce...
是不是: is or isn't, yes or no, whether or not...
奶奶: (informal) grandma (paternal grandmother), (respectful) mistress of the house, boobies, breasts...