Good evening good sir,
If you actually want to pursue this girl, and have her like you, it will likely take a lot of time and energy on your behalf with a large possibility of no success. My recommendation, however, is actually to just stop communicating with this girl. It's likely that she is just using you, particularly as an emotional tampon. My advice, next time she txts you, don't txt her back NO MATTER what. Time to move on buddy. Start looking for other fish, because there are plenty around, and more particularly, plenty who would LOVE and APPRECIATE to have your attention.
Drop this girl who has no consideration to be considerate to you.
Regards