What should I do if my best friends has been lying and using me from the start?

It felt like everything is one sided A friend of mine said she is my best friend but hide when ever she went outing with her male/ female friend She being close with other people she recently met but she never behave like that with me, I know her way before she even met them, I have help her a lot, I have tried to avoid her but she message me after 2, 3, days, recently I found that she has been lying to me a lot she said she never went out with any male friends except her female friends but that was not true, when ever I try to invite her she always say no that she is always busy with her family. What should I do from here

What should I do if my best friends has been lying and using me from the start?
Post Opinion