My best mate at uni and I are like this, we're pretty inseparable. Even though we don't look similar at all, people are always getting our names wrong. People ask me/her "where's your twin?" when we're alone. We were always this close, but now in our 4th year of uni when most of our friends have graduated, it's even more obvious. I'm just very grateful to have such a wonderful friend I get on so well with to be honest.