That is super effing unwise.
Early twenties is also too young to be seriously living with your significant other.
Too much time together is too much time together.
But then when it comes to relationships, I like my space, so this could just be my views on the subject.
Right now my housemate Brittany has her boyfriend, Brian, living with us. They live together, they work together, they do everything together. It has been this way for the past three months. Depending on the sort of people that your friends are, it could work. However it's also a very easy way to ruin a relationship.