Hi dramaqueen. I'm over here as a full-time student, and missing my family, friends and the familiarity of America is definitely a BIG factor for me. It can be very very hard at times, harder than you could probably imagine. I don't think you can really grasp quite how different things are on many levels until you're actually living here, and it can be a real challenge adjusting to that. Britain is definitely NOT America, despite the fact we speak the same language (more or less), and that can be both a good thing and a bad thing.
I've definitely found myself feeling quite a bit less confident here, and at times a little too dependent on my boyfriend... and I'm normally a very independent girl. It has sort of hurt my pride at times, I think. But I think the longer I've been here, the more confident I've gotten about being here. For one, I'm no longer as shy about my accent.
Also, things ARE more expensive (as I've mentioned in other posts) so your money doesn't go nearly as far, which has been another frustrating thing for me.
But negative points aside, living here really has really been worth it, for me anyway. It's wonderful to experience being entirely immersed in a whole different culture, and although there have been many ups and downs for me, overall I am SO glad I'm here.
By the way, Wales is gorgeous!