What to do about this girl?

There's this girl i was texting and we were flirting and everything, and she kept saying she wanted to be with me and stuff. But when we planned to do stuff she kept blowing it off. And then the other day i found out that she just started seing this other girl, n im not the type to get emotional, but i really fell for this girl, n i feel like ive been played, infact i know ive bn played. ive bn played before, but it didnt bother me, i just didnt expect this girl to do it, what am i suppose to do ?? xx