Relax, talk friendly to people, ask questions, bring bagels! Make friends.
If after two months you don't have at least a handful of decent aquantances to ride with/talk to, your in the wrong barn. Finding a barn with just the right mix of people is HARD!!! But they are out there, you just have to keep looking!
My current stable is tiny. Five acres and 10 horses boarded - 6 owned by the stable owner and her significant other. I ADORE the care my horses get, but find that I prefer to ride when the other boarders are not there. No one is competative, just really really different in ways to deal with thier horses. I don't like to watch someone set themselves and thier horses up for a wreck, so I don't watch. When asked, I give my advice but I am not phased one way or the other if it is used or not.
The stable owner and I have a blast riding together and there is one other lady there who I am fine with riding with - as long as she does not try to put her kids on one of her half-broke non-respectful horses. The other three... um, no thanks.
But give the people at your stable the benefit of the doubt. You could find that in spite of them being competitive, you find some great friends. Oh, and don't let age differences get in the way! The stable is run by a lady who is closer in age to my daughter than me (she just turned 25, my kid is 21), and we have a blast and can just stand around (and do all the time) and talk horses for HOURS.
Thanks!! Yeah, I have met a few friendlier people now that I have been there longer, found a really cool vet I am SUPER happy with but I really do think I may change barns, it just suck that I am from a smaller area so I don't want any hard feelings with the current woman I am boarding from, she has been really helpful to me and I know she is busy, plus she probably charges a lot of money for her time since she is a dressage trainer/USDF silver medalist and has a trainer come out from Germany!! English just isn't my thing, my sister LOVES to ride and I love to watch, I did a little jumping when I was younger but, we'll see how it goes.
I heard of another place that boards and the guy is really really nice and give's lessons with you and your horse, or you can us one of his, THAT'S what I was more expecting when I signed up for this place, cross my fingers the boarding cost is in our price range!! My sister who has more experience than me worked with my horse today and confirmed what I already thought, her manners are not great, she has an attitude BUT she is a fast learner, so that's good, my horse is still young, will be 6 soon and was owned by a teenager before me whom I suspect let her get away with a lot of things, we're going to get some respect in this horse!!!! Thank you for the kind words and encouragement, this boarding thing is sooooo new to me, I appreciate it!!