I'm 34 and was in a pretty similar boat. I stuttered severely through grade school, hs, and college. I lost count of how many days nobody could understand me when I was a teenager, I missed out on tons of social things because I didn't chit chat with people, I was awkward, it was hard to just "hang out and talk" for me - especially in big groups. I know that feeling of not being included because you're awkward to talk to. Frankly it was easier to NOT hangout with people. One of the best thing you can do for yourself is learn to be confident in being yourself. Stuttering is not your fault, you didn't ask for it or deserve it. It's just part of who you are and you'll find that the people who are around are probably worthwhile friends. I don't mean to sound like "Mr. Positive" - I just know the feeling and this is just some of how I've carved out my own happiness.