Should I Give My Partner Another Chance After Multiple Betrayals?

After a year in a long-distance relationship, I trusted and loved her completely. I did so much for her emotionally and financially. One day, I discovered she and my close friend were talking behind my back and deleting their calls and chats. When I confronted her, she lied, but I found a call recording. My heart shattered, and I experienced anxiety for the first time. We broke up, but after a week, we got back together because I couldn't live without her. She promised never to repeat this. I gave her a second chance. Things went well for a month, but then I found out she was still talking to other guys and deleting the chats. When I asked why she was doing this, she said they were like brothers. If so, why hide and delete the chats? I saw she had spoken to one guy for three straight hours the same day we fought. I walked out of her life. I slipped into depression and became insomniac. After six months of no contact, she tried to reach out, but I avoided her. I missed her terribly. One day we met, and she wanted to get back together, promising not to lie again. I gave her a third chance. After two weeks, I found out she was still hanging out with other guys and lying about it, calling them 'brothers.' She was also still in contact with my friends behind my back. I distanced myself from her. I tried to explain the limits for trust, but she kept doing things that hurt me. I forgave her many times, but now I'm done with these lies and betrayals. I love her and want to marry her, but I can't afford another lie. Should I forgive her this time and give another (fourth) chance? Please share your thoughts.