how to make our relationship work?

Me and my girlfriend started our relationship a little too quickly, we skipped the dating part and jumped into the relationship, but we've known each other for a year before. We've been together for a month and we've already told each other i love you and began sleeping in the same bed together. My original intentions with her were just sex, but it changed and I fell in love with her. Now she says that every time we share a bed we almost end up having sex and thinks that our relationship is dependent on sexual attraction.

But she is wanting our relationship to work because i'm the first good guy she has ever been with and the first one that she wants to have sex with, and she wants to be with me. I want it to work too, because her physical beauty isn't the only thing i'm attracted to, but as well as her personality and her heart.

Can someone give me some tips and i'm 19 and she's 18.