I have my account and was showing my boyfriend this game and he really wants to join but we live together so I don't want to get in trouble if you think I had 2 accounts. Can he make an account for himself or not? I don't want to share I have my own ideas on what I like and stuff and wouldn't want mine cluttered with pets I don't like.

You can make separate accounts for your relatives and friends. There's no problem in using the same IP, it's not a reason for ban.