AIO: Found out my long term partner didn’t disclose possible HIV exposure and I’m not taking it well at all

I recently found out my partner cheated on me with someone who is HIV+, and I’m struggling to process everything. I had suspicions because he was pressuring me to get tested out of nowhere. When he fell asleep at my place, I went through his messages (I know I shouldn’t have), and I saw a conversation with his friend (first image) that confirmed to me he hooked up with this person. He’s never cheated before. In tears, I woke him up and told him to leave, and he had to walk home in the cold.

Afterward, he told me her name and told me they had hooked up on New Year’s Eve, and I messaged her (nothing insane just asking about her diagnosis). She admitted she’s HIV+ and apologized. It was stupid to message her but I really needed confirmation on what I was dealing with here. The rest of the photos is the conversation we had after I had found out the full extent of what happened. He insists he wore a condom, but I don’t believe him. He’s promised to get tested and says he’s sorry, but I feel so hurt, betrayed, and unsure about what to believe or how to move forward. I am in love with this person deeply and everything has come crashing down and I’m most likely going to end our relationship. Am I overreacting? I feel absolutely sick to my stomach and I haven’t eaten in days. I feel like my life is over