Is this girl interested in me or no?

So last saturday I met this girl and we tlked all night till she fell asleep. Let me let you know that there was a lot of "abbreviations" used like :), ;) and others but idk if she was just using thoughs cause I was using abbreviations. Anyway, we tlked all day sunday flirting like crazy BUT since I say the flirty things and she says em back, idk if she's being serious cause I say em first. So after sunday, we tlked for a bit monday and she said she had to go to dinner and she would txt me back. I nvr got a txt back. So I didn't txt her tuesday and when wednesday hit I txt her that night and she replied in the same minute. Another thing that concerns me wit this girl is that I think I may comin on too strong. I say stuff like "hey I'm bout to watch movie, by self, and somethingss just missing" and she'll reply" what?" And ill be like "you :) hahaah". And I say stuff kinda like "hey I wanna c u :)" and stuff. In conclusion, I THINK this girl may have interest BUT idk if she's just replying with these flirty messages because I say em first. And how do I txt wit this this girl and she'll get interested in me?