I'm never more sure of myself than I am on Sundays. I have pretty effortlessly made friends at my new church and I've done it by being myself. I wasn't intimated by the "cool kids". I have made friends with good, genuine people who have allowed me to be genuine. I have even done things that have scared me, like being the liturgist for several services, and that has made me more sure of myself.
When I went to my friend's wedding in June, I spent a lot of time with people that I really didn't know very well. They were acquaintances who, for the most part, live in the same city as I do but I had only occasionally spent time with them socially. I was never self-conscious while talking to them. I just walked up to them, acted like I was awesome, and had a great time. Someone posted a photo of me with these women and I printed it off and framed it to remind me of what fun it can be to take a chance and be myself.
So the next time you are in a situation where you feel like you don't know anyone or your intimidated to talk to someone, remember this: Just go up to them and act like you are awesome. Because, you won't be acting. You are awesome.