Girlfriend gone for a meal and drinks with 2 blokes

Maybe she hasn't replied because she wants to have a life outside of the relationship? You can't expect her to fully enjoy herself if she's giving you updates throughout the night. Stop being so paranoid, if she was having a threesome, I'm sure there are more discreet ways of going about it than having her boyfriend give her a lift there.

My girlfriend has gone for food and drinks at her friends house, it's just her and two lads. She worked with them last year and said they're close, with one moving away soon hence the social. One apparently has a long term girlfriend. I was absolutely okay with it before and even dropped her off, but she hasn't been replying at all (we usually text all the time and yes I understand she's socialising so won't be glued to her phone, but all other nights out she's replied a few times)
She's absolutely stunning and I've been cheated on before, so now my mind is racing. It's a strange scenario to me to be having food with just 2 blokes anyway to me. D'ya reckon i'm just being insecure or would you wonder too?

Really, the decision is yours to make. Although the situation looks a bit dodgy to me as well, your reaction should depend on how well you know your girlfriend. Don't make a rush decision but don't wait too long either, stand your ground.

We don't live together, but she texted me once she got home and i found they were coaxing her to drink more (she's a slow drinker) and they apparently just chatted all night. We've been together a couple of months so I think i know her well, but you would always say that about your partner and some cheat after years together. I'll judge her behaviour in person, that's usually a giveaway.

Following this logic bisexual people shouldn't be allowed friends at all.

Maybe she hasn't replied because she wants to have a life outside of the relationship? You can't expect her to fully enjoy herself if she's giving you updates throughout the night. Stop being so paranoid, if she was having a threesome, I'm sure there are more discreet ways of going about it than having her boyfriend give her a lift there.

if she was planning on cheating on you, would she really tell you she was going out with two guys? I sure as hell wouldn't.

One's going away, one is in a LTR. They were probably just trying to get her to drink more because that's what you tend to do with someone who's drinking slow and you're trying to have a good night...

Maybe one of them has a thing for her, most likely it was innocent and just 3 friends enjoying themselves. Although I have seen videos like this...
Odds of last night's antics ending up on a certain gentlemen's interest site, fairly high I'd say.

Leave her in peace OP. I always believe that you should let your SO hang out with the opposite sex as you'll know if they can be trusted then, right?