Turned out he has a girlfriend and cheated on her multiple times, what should I do?

Ann133

So I'm (22f) texted with a guy (21m) for a 3 month. I fell in love during this time. we never met in real life and I feel stupid that I liked him. but then I found out that he has a girlfriend, that he cheated on her several times and that he communicates and flirts not only with me.
It broke my heart and I'm having a hard time dealing with it. I guess I should tell her about everything but I'm a bit afraid not gonna lie. What should I do

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And that's my first experience falling in love so it's more sad
Turned out he has a girlfriend and cheated on her multiple times, what should I do?
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