Same story

So as i said im pretty solid in person but almost completly clueless when it comes to texting cause honestly i used to hate it. But i realize its just way to stupid not to use it cause its kinda the main reason you get a girls number in the first place. So my second class of the day i had some pretty baller momentum goin but was literally about to fall asleep in my second class. So the teacher turns the lights on and says we need to meet the person next to us for networking n shit. He then stresses about how repetition is so important and tells us to meet one more person but this time hes like, oh and i guess you can get up and move for this one. Very few get up but i was eying this cute girl across the isle so i ammetdiatly step up before some other dude gets her first ( Which is doubtfull ;) ). I stick my hand out while shes sitting introduce myself ( Like a boss ) and i sit down in front of her and we get to know each other, exchange numbers and names ( she wanted first and last ) so it went pretty awsome. So my main question is, how the balls do i text her but let her know that im texting cause im interested and not to talk about our class subject and other chode stuff.