One of my boyfriend's friends (a girl) came onto him a few months ago. He didnt tell me about it but i later found out and he promised not to see her again. However, i found out yesterday that he was going to be seeing her at the weekend when he was going out with her and a group of friends. I asked him who was going and he said just the boys. I then asked him if he was hiding anything and he promised he wasnt and then got angry at me for not trusting him. I then told him that i knew she would be there and he admitted he had lied and had hoped he could be friends with her behind my back. I feel really betrayed by him and shocked that he could so easily lie to my face. Im completely sure there is nothing between him and this girl but im just so angry that he was so deceitful about the whole thing. I dont trust him to be honest with me now and dont know how to move on from here. We wont break up over it but he wants to know what to do to put things right and i dont know what to say! help!!!