In relation with bestfriend!! Dun wana lose frdshp o love :(

i need an advice over my relationship. Here it is... M dating a guy who was ma bestfriend for 2 years. Everything is very good between us. We are doing well except the thing that he lied (hided) to me that he had oral sex with his ex. He told m after two months. He lied to me and also he had oral sex both things are disturbing me alot. Some how i am not able to accept him after knowing the truth and also his ex still keeps on calling him and texting him. He ignores her, i trust him with that but still it some how disturbs me and i feel like breaking up when i think about it. What should I do? M losing a bff and a bf, i can't b without him. Plz help. What should I do? Date him or no? What should I do to avoid that thing of he getting physical with her and not letting it spoil our relationship!

Maybe give him another chance but if he gives you reasons to believe he does things again ends it. He at least told you and ignores her now make him change his number maybe it will help