Visitor Visa - B2

Hi

Im 32 years old single Turkish male working in Saudi Arabia. Today i had an interview in US embassy in Jeddah KSA and rejected. I'm scheduling and cost controls chief in an Saudi company. I came to KSA in 2012 then couple of times i left and came back. Since may 2015 i'm in KSA again and working. My previous jobs in KSA were all with my current employer. My documents were complete from employee letter to bank accounts. Nothing was missing. Below is my conversation as far as i remember:

VO: Good morning (VO was ayoung American lady)
Me: Good morning
VO: Please pass me your passport.
Me: Here you go.
VO: What is your purpose of visit ?
Me: It is a touristic visit and i will see my childhood friend.
VO: where are you going in US ?
Me: San Francisco
VO: What is your friend doing in US ?
ME: He is working in a Germany based company.
VO: What is his job ?
Me: Medical diagnostics devices
VO: Have you been in other countries past 2 years ?
ME: Yes Bahrain, Qatar, Brazil and Turkey.
VO: How many years have you been in Saudi Arabia ?
Me: one and half years
VO: What is your job ?
Me: Im civil engineer.
VO: What is your salary ?
Me: xxxx Saudi Riyals
VO: Which company you are working for ?
Me: yyyy company.
VO: How many days will you stay in US
Me: 13 Days
VO: Sorry you are not eligible to enter US
Me: But why ? I even bought by plane tickets and reserved my hotel already !
VO: Sorry but we encourage our applicants not to buy any tickets before the approval of US Visa
Me: OK can you tell me what am i missing ? Next time i will cover them up.
VO: You are not missing anything. As per US law you are not eligible for US Visa.

Before the conversation i was panicked. I couldnt speak clearly. I lost my cool. Whole conversation just happened like in 20 seconds! I definitely stuttered while speaking. I realised that the VO lady was kind of lokking through my facial expressions because she wasnt focusing my eyes but all around my face. I was totally unprepared for this conversation.

 All the information i provide indicates that im in high treat level. Im a single male with some money without any property or bond with any country with a popular proficiency. I have not any single intention to overstay in US or illegaly immigrate at all ! i will just spend my winter vacation with one of my childhood friend, have some fun, do some shopping, relax and return to my job thats all. What should i say what shouldnt i say in my next interview ? Or Should i re-apply for B2 visa soon like in upcoming 10 days at all ?

Regards
Volkan