Okay so i have made a number of topics lately, but finally talked things through with my gf, and then we got to the bottom problem.
I have been dating my girl, for the latest 4 month, one month before we got together she was dating a guy on and off for 3 years, and one before that, the point is she havent really been single for 4 years, and she is only 18 like me.
Now she is a girl who dont like to go out and sleep with a lot of guys (slept with 3 incl me) and she dont need to be single because she wants to flirt and kiss with other guys. BUT whenever she is out she feels like she has to think about me feelings since there were 3 episodes when we were in prague, where she was out drinking and we got upset with eachother, (she flirted, though she was unaware of it herself, and she was really drunk all three times making me overprotective, in which case she wanted to get a bit distanced from me) so she feel like she wants that freedom when she is out, and that she dont want to have to think about my feelings when she is out (again not that she want to see other guys) and she dont want to feel dependent on anyone. Therefore she was sad that we had met each other only 1 month after her break up. so she did have that feeling of being free and single before we got together.

So we got talking, and we are really really happy for each other and love each other, so the problem is that she thinks in some way we would be able to be together forever if just waited a year or so with getting into a relationship.
and in some way i think she is right, but then again a hole lot of shit can happen in that year making in impossible for us to find back together, which neither of us would like.
But since that is the case i asked if we should try to break up, or take a pause in our relationship.
But this she did not want to, she wants to be with me she says, and we have to stay together.
which i agree with.

but the main problem will still be there, so what can i do in this case, just give some extra space when she is out??

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My mind have an idea of what i deserve - i will go beyond it

Seems yall are at a young age so it might be hard for you. But you have to learn to give her, her girls night out "to put it", put aside and jealous feelings and trust her fully. That is the only way to fix this problem. 18-21, who doesnt want that feeling of freedom, getting out of parents house, getting out of high school, add to yalls situation her getting out of a 4 year relationship. She may go out and flirt, have a good time, and possibly get a little more flirty that you wish. But if she truly wants to be with you, then she will not go to far.

If a girl is going to cheat, she is going to cheat no matter what you do.

If you don't trust them then you'll just go insane and sabotage the relationship. I don't have a lot of money right now so when my (now ex) girl went out with her friends, I just chilled with the guys and left my phone to one side.

- You trust her? That’s my question. And if you do, let her out and let her enjoy herself. And you too, go out and have some drinks with your buds. Because the more you want to limit her, the more she was craving to go out, and that would be the start of your misunderstandings.

Thank you guys for brightening up my problem, what all of you said make perfectly sense!

I really do trust her! (example: i let her talk to her ex boyfriend for 3 hours without assuming anything bad)
The problem is, that i get really angry whenever i see her sort of flirting with guys, and she only does this when she is really drunk, and i believe that she is not even aware of it herself, i guess it is jealousy but i just dont like the thought of guys believing they can actually have my engel, or guys getting turned on by her. i just dont know how to deal with it

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My mind have an idea of what i deserve - i will go beyond it