<human>: Can you provide a brief overview of the text?

I'm [16/M], my girlfriend [17/F] and I could not be more close than we are now.  We've been dating for over six months now and she persistently says she will not go further (physically) than we already have.  Her last boyfriend of 18 months had received handjobs and got the chance to finger her.  It deeply hurts me to hear that she won't let me please her like her ex-boyfriend did, even though I "am the best boyfriend she's ever had". 
How can I introduce the thoughts of taking the relationship further?
I've thought about talking to her and expressing my feelings, but haven't done that yet.
<bot>: Girlfriend will allow a mediocre boyfriend to be more physical then the great boyfriend (me).  Should I give this time, ask her, tell her how much it hurts me, ...? Thanks in advance.