Help please?!!

I have been with my bf for 2 years, we were very casual at the start and we split up last summer for 6months but got back together. He seen a girl during this time and done this with her that he never done with me like go on holidays. I get cross when I think about this. Also i have recently checked his emails and he is talking to other girls and suggesting meeting up with them. Even though i am a strong person i can not seem to end the relationship, when we are together and do stuff everything is fine but i can't seem to forgive and forget? Should I end the relationship or wise up and give him the benefit of the doubt?? Its driving me crazy

Sorry for late reply

You should confront him about it. Sit down and ask him about these women. If he can answer quickly, it means he's most likely telling the truth. but if he stutters or doesn't try to make eye-contact or just pushes the convo away, it means he most likely isn't taking your relationship as serious as he should
sorry bout this late reply
hope it works out for the best for ya
x