So me 21 years old and my gf she is 26 dating 3 and half months we both celebrate our birthday together at a restuarant so i orginized our birthdays, long sotry short some dude telling me "Oh i speak with your gf and iam coming orginizing with you" little backround, he is kind of my friend who would never date a friends woman, but this dude is good with woman, really good, my gf always laughs from him jokes (he is our mutual friend and she knows him from school i guess like more then 8 years?) anyway i told him via text:

me:"Why you need to come to orginize our birthday? its ok i can handle it on my own"
he: "as you wish"

so i asked my gf what they were talking about (she didnt even told me he is coming if he didnt told me) this is out convo.

She: "yes i asked him avout other restuarants and then he called me and said there is nothing else beside this restuarant, and asked me when me and you are going to go to the guy to pay him the money for our places, and he wanted to go with us."
Me:"3 people for orginizing our birthday?really? for what?"
She:"i didnt think it would be a problem"
Me:''but i already told you there are no other restuarants beside this one we already discussed it, we dont need to complicate this anymore"
She:"maybe he want to see this place? or the menu?"
Me:"so if he says this place is shit we cancel our birthday because of him?"
She"he wont say this, maybe he just a lift from the work" (seriously wtf?)
Me:"so when YOU are planning to go there?" (i mentioned them because it seems like two of them)
She:"around 5" (so when i said both of you, you didnt even corectted it lol...so there are you two)
She:"why?what is wrong something is bothering you? because if something is bothering so tell me, you always tell me to speak to you if something is wrong and communication is the key" (yeah right like you getting angry at me for couple of days and then you only speak about us? lol nice communtication)
Me:"go without me, i have gym at 5"
She:"wtf is wrong so do your training earlier and come, stop making excuses"
Me:"never mind i have to go to sleep iam tired, hard patrol was (iam at the army i do 7 days at the army 7 days at home and it goes like it, it means she doesnt see me for 7 days and then sees me for 7 days)
She: good night
Me: good night

The fact that you are worried about your friend shagging your girlfriend will ironically happen if you carry on being insecure like this.

However, now that I have just found out you're in the army and away from home- alone makes ME paranoid for you haha

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USER HAS BEEN BANNED FOR REPEATEDLY IGNORING MOD WARNINGS AND MULTIPLE RULE VIOLATIONS

thats was helpful? any other opinions on how to get this way around any suggestions if she asks me what was it all about yesterday at night? how should i react regain some loose of power over this?

Writing posts that make sense would be helpful

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USER HAS BEEN BANNED FOR REPEATEDLY IGNORING MOD WARNINGS AND MULTIPLE RULE VIOLATIONS

This post was almost impossible to understand. Like I had to read it 3 times and still don't really get it.

You're being controlling and paranoid. My advice would be to loosen up and either trust your girlfriend... or decide that you do not trust her (in which case you shouldn't be with her).

Your communication is passive agressive

She asks you if you have a problem. You should tell her simply that you don't want your friend to be there but just the two of you.

But instead you act upset. If I was her I wouldn't know the reason you are upset from this conversation. She is not a mind reader mate.

Tell her that you don't like her being with your friend.