UPDATE! I (23F) saw my boyfriend (24M) have sex with another woman

Thank you all for your kind words and advice.

For context: https://www.reddit.com/r/relationship_advice/comments/15eba1p/i_23f_saw_my_boyfriend_24m_having_sex_with/?utm_source=share&utm_medium=ios_app&utm_name=ioscss&utm_content=2&utm_term=1

Today I spoke to my landlord and we removed my name from the lease of our apartment, the landlord has also offered me a similarly priced place at another apartment complex that he owns. As for confronting my boyfriend, I didn’t, I couldn’t stand to talk to him about what I saw or find out anymore details about what he has done, with who and for how long. I packed all of my things while he was at work and I left. I blocked him on everything. I left him a note on the table, “you know what you did, never contact me again”. I also took the advice of many of you and got tested