Another girl kissed him! Should I break up? HELP 😡😭

So yesterday I made a poll here. My bf ignored me the whole day on saturday and his snapchat story was him in a party i was not aware of.

And there's this one picture where a girl who I have no idea who she is kissed him on the cheek. She had her boobs hanging out as well it disgusts me!

On Sunday he ignored me til 4 pm! When he messaged me, I replied then he left me on read. At 6 pm he told me "hey sorry I was too tired to reply."

Then I was so mad I didn't even mention about his story I just replied "you don't have to".

He messaged me "hey" at 10 pm and I just left him on read now idk if I should reply or what should I do?

On past occasions he lied to me as well.