TO DROP A FRIEND OR NOT... 🙄

So one of my best friends for about 10 years has been with her boyfriend for 1 year, about 4 months ago she found out he was texting other girls (to me that's cheating), plus nudes were exchanged. She found out at the same time (so 4 months ago) and stayed with him and he has continued to cheat on her and she has caught him out NUMEROUS times since. At least over 7 since then and she tells me as soon as she finds out every time and I've told her from the first time to drop him and she deserves better, but doesn't listen because she loves him and he's just 'hurting from his ex,' and anyways when she's drunk she gets really horny and starts dancing on guys and if I confront her saying she has a man at home she goes off and says he's cheating and if he can do that so can she, then when she's sober she talks about how much she loves him and stuff like that. And I'm just so sick of telling her the same shit and listening to him cheating and her staying around. It's gotten to a point where I just want to cut her off completely cause it pisses me off so much. Should I actually drop her? I'm just really over it. And I'm not one to tell her she's a slutty drunk and a sober lover but I'm just done. 💀