Hey guys, sorry if this drags too long, if you do read everything and understand whats going on, please try and give me some tips on what to do.
Yesterday night i went to my friends kickback where the girl that I have been talking to for a good 9 months, during that time we have done a lot of fun things together:D talking alot and having a good time. but 2 months ago she started to feel that i was getting too clingy since we both agreed we both didnt want a relationship. She didnt talk to me for 2 weeks and texted me saying shes sorry and wants to be friends again. I didnt reply. she saw me somewhere and then said the same thing in person. I told her i was very hurt and didnt want anything more, and wanted to be friends again.
These last 2 weeks we have been texting and constantly flirting.
Okay so back to yesterday night. Everything was going great in the beginning, i could sense her looking at me a lot. But i had no motivation and was very nervous to talk to her. This always happens to me when im around her. When she started a conversation with me, I cant put my thoughts together and reply with a stupid one word cold answer. Before this day, she told her friend she wanted to be 'fuck-buddys' with me, we never had sex together.

her friend told me and I wanted the same, nothing more.
I dont know how she feels about me now because of last night, but I could tell she was kind of shy too.
Overall im shy, nervous, and have approach anxiety at times. When im comfortable with the person in front of me, whether shes attractive or not, My game picks up and I could get any girl i want.
Can someone help me boost my confidence around this girl?
I need someone to help me with my game, If I approach her and everythings going right, somewhere in the middle of our conversation, it dies out because I freeze up and dont know what to say next.
When we text, Everything goes great, i know exactly what to say, she responds back talking about sex etc.. its just that in person i get really nervous. I think its because of my speech impediment i have, usually i cant say the letter 'r' and I always bash myself because of that.
To test myself, I want to minimize texting with her and just talk in person, which we see eachother once a week or once every two weeks.
My intentions with her are only being friends with benefits.