I can't get over my ex-girlfriend who kept me cheating

[Unregistered]

I met a girl about 8 months ago. We started dating and I fell in love with her. Deep love. She said she loved me too. We were going strong when one month into the relationship, she cheated on me and hooked up with someone. She said it didn't mean anything and she's sorry. I thought it's too early in the relationship to let her go. So I gave her a chance. About 2 months after that, she started talking to her ex, who's now in the US. I didn't stop her because I thought she needed him to completely get over Him. Then, first she sexted him and then flashed him on Skype. She said that she had residual feelings but now it's over. I was shattered, hurt very badly. But I gave her one final chance. Now, after 4 months after that, she secretly stared speaking to her ex again, and sent him nudes. She says she loves me and she won't do anything again. I couldn't let it go this time. So I dumped her. She says that she's gonna cut her wrist if I don't come back. I don't want to go back into that abusive relationship. And I know she won't cut her wrist. But it's just that I truly love her, in the purest sense. My life has come to a standstill. I cry all day long. I feel like I have no purpose in life. I don't think I'll ever get over her. I just want some advice as to what can I do now. How do I get over someone who I love so much?

P.S she still keeps texting although I've blocked her from everywhere. But I can't block her texts. The texts make it all the more difficult