Hello reddit, I think you all might come to a conclusion of "just communicate your feelings to her" which I definitely understand and we do that often.

I 23 M and my gf 24 F have been dating for about 1 and a half now and everything has gone pretty good, we had arguments and stuff before about other topics and always sorted it out so im not scared to talk to her about my feelings and vice versa. I am just more concerned if that I am over thinking things way too much. I have trust in my gf 100% but it's just the actions that get me concerned.

Just yesterday she flew into Vegas to meet with her gma and hangout with her ( I will be visiting her tomorrow to celebrate my gf birthday ). They went shopping, checked out secret bars, and watched a show which was great! The red flag that caught me off guard was this next sequence. Later that night after the grandparents went to bed , around 12am, I got a snap from my gf saying that she's just gonna go out to the bars and find a group of girls to mingle with and perhaps party with since she was already drunk, I was okay with that but told her to be careful and to update me throughout the night because yk it's Vegas and some people are weird. She then goes to a club with them called Omnia and that was a club that I wanted to experience with her on her birthday, so already that kinda made me little jealous because it was suppose to be a whole planned out thing with me and her and not some strangers (no update, only found out by her story and not text). She then goes inside and gets drinks, im guessing one of the girls in the party got a table. They get to the table and a male is talking to her, my gf says " I told him to hangout with us because he was alone but not like that kind of hangout). This immediately caught me off guard because I have not done anything like this to her and I have not seen her this open to talking to people ESPECIALLY at the bars, for the most part back at home she just doesn't even mind the other guys at the bars.

The night goes on and its about 1:30 am and still no update or anything from her. The next thing I see is a snapchat of her and a dude taking a shot together because it was a birthday shot for her. I snap her back and just casually say like tf is that guy and blah blah, no response. Okay usually she responds back to me or even checks up on me when she's with other people or in a different country (she is very drunk at this point). around 3AM i call it quits and decide to go sleep, I see her location somewhere else without telling me (we usually communicate to each other if we are heading somewhere or what we are doing just to keep in touch). So she went from Omnia to The Cosmopolitan IDK how long she stayed there but it looked like it for a fat minute because I got too tired and fell asleep around 3:40AM. Got a snap from her at 4AM saying she made it home safely and what not. I woke up hella early so around 7AM and sent her a snap of me saying "thanks for updating me throughout the night and drinking with other guys" just to see what she was going to say. I went back to sleep and woke up around 12PM LOL. Woke up to texts saying she got home safe, how fun Omnia was, that she loves me, shes hungover, and how much she wishes I was there. Now shes hanging with her gma and what not.

Why Am I Jealous?

1. Barley any texts, calls, or updates on where she's been and what she is doing. Not normal for her to do that and every time she's drunk she calls and texts me how much she loves me
2. She was out VERY late, not like normal she usually wants to go home after 1:30AM with me and her friends.
3. She was out with strangers then decided to randomly talk to a guy just because he was lonely?
4. I have been thinking about this whole situation throughout the whole night barely got sleep so I might just be a little delulu
5. She is not like this back at home or even goes to the bar to find a group to hangout with which was weird even for me to hear.
6. I was in the exact same position as her last year and every time she texted me I texted back or called back. Kept updating her when I was going somewhere and who I was with. Any girl that came up to me I quickly shut down the conversation if they had any intent of trying to get with me.

I may be overthinking this because of the lack of sleep but man has it been eating me up to talk to her about it because at the same time I am sure she won't do anything with any other guy. She has boated me to her family and has been telling her friends we are gonna get married and etc. But to see her act this was and especially in Vegas where "what ever happens in vegas stays in vegas " goes around has me worried a little. I am also afraid to bring it up because it seems like it's an argument from nothing. I understand it's her birthday, it's Vegas, and she wants to party and she can do whatever she wants.

I also want to note that she has always said that she loves me, loves my abs and body and don't get me wrong she has an outstanding personality/body as well so for other guys to come up to her and not shut them down like how I do does tick me a little. I just don't want to cause something because it's her birthday and it would be shitty of me to ruin her birthday week / weekend just because I over thought something.

Thanks for everyones response!

Edit: Will post an update on our phone call since people are telling me to call her and talk about my feelings, while some are saying she's cheating and others saying im a control freak maniac.