Сидела дома? = Were you staying at home?
Пойдешь в гости? = Will you come on a visit?
Да, завтра я пойду в гости. = Yes, tomorrow I will go on a visit.
К кому ты пойдешь в гости? = To whom are you going to go on a visit?
Я пойду в гости в своему другу. = I will go on a visit to my friend.
P.S. I you really want to get a deeper understanding of what each word means, write to me and we'll puzzle that out. I could be wrong with the translations.