James lives in Spain. He's a guest / an old friend of mine.
an old friend
We have some guests / members staying at the moment.
guests
I like all my contacts / classmates at school.
classmates
I have over 100 contacts / guests on social media.
contacts
Are you a member / penfriend of this club?
member
I have a big family, so I have a lot of close friends / relatives.
relatives
Sarah has a penfriend / contact who lives in France.
penfriend
Of all my friends, my relative / best friend is Sophie.
best friend