Should I be upset?

My boyfriend of 8 years so called baby mother says that he's still messing around with her. the whole time I'm like no he's not. And here she comes with receipts. She sent me text messages of him asking her could he sleep with her. He told her he doesn't even talk to me nor sleeping with me lol. I'm so ready to leave him alone. I'm thinking he's not even taking care of their baby and she sent me a text of him asking her what does the baby need. 🤣When he got her pregnant, they didn't even know each other. She told me herself she didn't. I don't care what she thinks. I'm not letting her get my man. 🥱she's a known slut who sleeps with his family members.

Should I be upset?
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