Losing my virginity

My boyfriend of almost two years and I are thinking of taking our relationship to the next level. I'm 19F and he's 23M. We've been seeing each other for about two years. He's my first boyfriend and my first for everything that we've done, which is pretty much everything except penis in vagina intercourse. We are great at communicating our thoughts, feelings and what pleasures us. I was wondering what else we should talk about, and how we should prepare?