<human>: Can you succinctly summarize the text in 1-3 sentences?

My [29M] partner [25F] of 18 months recently booked flights overseas with a girlfriend of hers without really talking to me about it, which upset me at the time.  

I felt like as a couple we should at least have talked about it. She earns a lot more than me and said that she decided we couldn't afford for both of us to go, and that she'd been to the destination a few times so it was different to travelling to a destination we both hadn't been to without me. I felt like it was a real single person choice she made without really thinking about the both of us. And it's a destination I've been dieing to go to. Anyway we eventually talked and I said it's fine I just wish she'd talk to me about before she booked her flights. It still hurts a little, but thats not the concern of my post. 

I'm pretty insecure but I trust her, so long as she not under the influence. I know she loves me very much. But I'm certain she's going to party and I'm worried she's could do something that would upset me (if she told me about it or I found out somehow and maybe I'll just never find out and be none the wiser). I don't think she'd do anything to intentionally hurt me. She's just very friendly and loves chatting to guys when we're out. She's just not the type of person who's able to say no when she's having a good time. 

I want to talk to her about my insecurities because I feel that hearing any kind of reassurance from her will make me feel more secure, but I think raising this suggests that I don't trust her and I'm sure the conversation will just go very badly. 

Should I talk to her? Or just wish her a safe and fun trip? 

Has anyone else travelled and party overseas without their partner? Were you able to remain faithful? Thanks.
<bot>: My girlfriend is going overseas without me. I don't trust the drunk or high version of herself. Should I talk to her about it?