Ex = friends?

Bf of two years got caught talking to another girl he claims he was being a wingman to his friend when he went out with his friend to a bar and that he saw her and her firmed (along with his friend) 2-3 times only. She sent me texts of them texting and he was the one basically asking them to go out and he told her she looked pretty “last night when they went out” he told her he was single and he asked her if she thought he was attractive etc....

I broke it off with him cuz what he did wasn’t okay...for 4 almost weeks now he would try everything in his power to talk to me in person and to try and get me back but i just can’t be with him cuz i don’t trust him...yesterday he somehow got a hold of me and we talked on the phone and it was him trying to explain what happened and that it was a stupid joke and didn’t think it was cheating blabla we fought and cried but ultimately i told him maybe in the future we can restart as friends who knows but joe i can’t even think about him and relationships....he also said in the end “if you have urges ;) we can always be friends with benefits” i laughed it off and said goodbye .... he also said before that that i can call him whenever i want and that he can’t imagine being with another woman and that he will always love me ....