Tranjan hit it on the head (no pun intended..lol). right now if she sees u as just a friend... thats not good. but the good news is that doesnt mean u cant change her mind
to do this FRAME her sexually and be more playful/flirty/kino her. See how she reacts... push pull as tran said to build attraction and THEN ask her how good of a kisser she is.... and if she hesitates this is what u say
"Really? I think we should find out" - Go in for this kiss no hesitations.
The girl will go W it. Iv gone in for many kiss closes and have yet to be rejected, but i have only gone in for them when the time was right (AKA she is giving IOIS and understands im after her pussy).
ull get there, u just have to be bold and go for it.
GL,
Duke