Girl help............?

im am 15 she is 13 aparrently she is seeing someone but there not fully boyfriend girlfriend yet a few days befor thay started seeing each other i got a inbox from the girl i like saying "goddd! havnt spoke in a while! miss me!?x"then i said "ino were u been lately n silly question av i missed u yea iv missed u :) xx i dnt no when im next on so dont think im ignoring u ok xx"then she said"Hahaa okk mateee! Glad ya missinn me! Speak to you sooooon :) xx" after that i commented on her profile pic and said"love it :)xxx" she replied with " calum! havnt spoke in a whilee! missing yaaa! xxx" then i said" missing ya 2 bex n ino should have the internet back in a few wks xxx then she said"okaaay:) xxxx" thats is but when iv been texting her the past few days she has been puting 3-4kisses x* iv asked if she would like to hang out in the school holidays she said she will see and that if she does she will bring a friend as she is really shy,does she like me or just as a m8 please help? what do i do cos she is seeing someone do i still talk to her like i normly do please i really need help btw we use to talk for hours but know we have nothing to talk about what do i do about that