Is difficult because there are two sides to it here.
The villa is intense. You're with someone 24/7 and sleeping with them every night. It's a false intensity that you wouldn't get on the outside for the same length of time.
So yeah, they've known eachother around 2 weeks at the point that he goes on a "lads holiday" and cops off with someone else. Outside of the villa, probably not a deal breaker. Inside, the emotions are magnified.
I think Liam is very immature. And that's why he laughed when he was caught out. He didn't know what to do in that situation. It wasn't because he was feeling snug or because he doesn't care. I think he has genuine feelings for Millie. I really do. I think he was forced to look at it from the perspective of knowing someone for a short time and then going on holiday. He's very, very, easily lead.
Given a chance to mature I actually think he and Millie could be good together. He needs to learn a lesson. He needs to apologise. He needs to make her breakfast, lunch and dinner everyday until she tells him to stop. But ultimately I think they're not so far gone that there's no come back.
Unpopular opinion.