Thank you, for your adivices and let me know what you think about it.
I'm using some of them.
I called her in the morning to knew who was that guy, and she told me that she didn't have a boyfriend and that she didn't know who could be ( I had my doubts, I mean who knows if she was telling me the truth

). The fact that really matters is that since this kind of confusion happened, our relationship is exactly as I want it, so I think it works for good.
After this,i was thinking about how everything happend and I think this could be use with girls in general, let me explain you, I hope it isn't so confusing.
When I text her about the other guy (I let her knew that some guy called me like if he was her boyfriend, no explications to her)
She was a little confused , so when i called her in the morning, to knew why called me his boyfriend, she told me if she was with somebody and the amazing part is that we get conect it in the way I want it.
So, I was wondering if this ( about text her or called her, that some guy called you, it doesn't care if it is true or not) could be use with some others girls, to know if they are with someone and on this way we know how the situation is and we get the information without sounds desesperate or something like that.
I don't know, it could be like a kind of routine to be sure or aware how dificult will be, how to move and you'll have her just where you want her.
At least it works on me that is the reason i am saying this, so what do you think about it? Also advices and suggestions are welcome to make it better because i think is not so bad just it needs to be polish.