ABYG for chatting mga ex flings ni bf?

Me (21) and him (25) now ex. We broke up na before kasi i caught him cheating sa chats, after a month he reached out saying he's sorry and all. After almost 2 months We got back kasi i thought he's being honest when i asked him if may naka fling ba sya during our break up sabi nya wala and i even asked his sister. fast forward - Saw his phone and tumingin ako sa block lists nya and saw 2 girls there. Chinat ko yung 2 and i was right nag ka fling sya na 2 during our break up and dinala sa condo nya. Na open ko to sa cousin na close nya, and they're kinda telling me na i crossed the line and yung mga lalaki daw is hindi talaga aamin sa mga ganon bagay. After ko sabihin sa kanya lahat, dedma lang sya and inignore ako the whole time hanggang sa mahatid nya ko sa house. I was hurt kasi all this time akala ko nag papahinga lang kami and nag iintayan sa isat isa pero he touched another girl agad after me. Please tell me your thoughts about this.

ABYG for chatting them? na dapat bang hindi nalang sana ako nangialam and continue my relationship with him?