Just so you know...

If you were to see me out and I'm not overly friendly, please don't take it personally. I'm usually very extroverted and somewhat over-talkative with my close friends and family but I feel awkward when I try to make small talk with people I haven't spent much time with. I don't mean to come across like a snob at all. I just go blank once we are passed the "Hi, how are you's". I'm trying to work on it and have more confidence and hopefully I'll be more outgoing with people I haven't gotten to know on a more personal level. I just need time so please bear with me.
I was recently told that I have left someone feeling indifferent about me because I wasn't very friendly and they got the complete wrong impression of me. Because I am so talkative with my close friends, i think it's hard to believe I can go into "shy mode" but I really do have a shy side. Two years ago at a distant relative's funeral, I was introduced to three men who were friends of the family, and they were all staring at me, you know all casual and courteous-like, and I just felt like all these eyes were on me and my knees buckles, next thing I know, I fainted. It was crazy. I just blacked right out...So yeah, I have some issues but I'm not unfriendly on purpose. I value my friendships so please, don't get the wrong idea.