I'm in Highschool
I have been in a relationship with a girl for 2 weeks, it will be 3 weeks on Friday.
So far the only kino i have done is frontal hugging with my hands on her lower back, hand holding, 1 kiss on the forehead, placing my hand on her waist when standing side by side and kinda tickling her a bit.
She has initiated some of physical contact as well like holding my hand and putting her head on my shoulder, but i didnt notice at the time

so i didnt go for the kiss.
there is this 20 min period after school before the buses leave that everyone just hangs out for a while, i will be chilling with my friends and she will always come up to me, i could isolate her into an empty hallway,
but how would i escalate and kiss close from their?
also what do i say after the kiss?