Partner on holiday with a female friend!

Agree with this. I thought it was just the two of them but a woman taking part in a group holiday is totally different and I wouldn't have an issue with that. I am guessing the reason he lied was because he knew what your reaction would be, and he was right, rather than him thinking he was doing anything wrong. Perhaps you are just not compatible and then it's good that you broke up with him.

I'm not good at the female friend thing, this is literally the only topic that came close to splitting me and my husband up over the years.

Unfortunately my ex used to meet up with his female friends and hide it from me. I'd find out from receipts or from them telling me not realising i wasn't supposed to know. Not cool. Left me massively insecure about that kind of thing.

I would not be ok with a female friend joining them on a lads holiday but it's not like it's just the 2 of them so I think I'd be able to look past that. The main issue is the fact that he didn't tell you she'd be there, sent photos where she was clearly deliberately not in them and then lied saying she might come when she was clearly there all along! Sounds like he knew you wouldn't be ok with it so hid it from you.

Well done for dumping him. You don't want him treating you like that again!

I disagree if she's a member of this friendship group. Men and women can be friends, would you honestly not be able to go on holiday in a mixed group? The dishonesty is an issue but perhaps he was concerned about this reaction? If it was the two of them together then that would be one thing but I don't really see an issue with a female friend joining a group of male friends, on the face of it.

Well he lies, & then lies again, whether or not she is a threat to you. So not much point really

You’re under reacting

Sigh.