Tracy is so right - it does get better but so many of us have been there! Not to scare you, but it took me a good 6 months or maybe a bit more to start really feeling like this was "home." A big part of it for me was relying too much on my b/f to be everything to me - driving me around, keeping me company, etc. It took a toll on both of us and things really turned around when I started making friends of my own and feeling confident enough to go exploring on my own (these sorts of websites helped tremendously!!!)
Things that made the biggest difference for me:
1. Getting outside at every opportunity. The weather made me feel slightly claustrophobic so I started going outside - to the mailbox, the grocery store, a walk around the block, pulling weeds in the driveway, anything - litterally whenever there was a break in the weather.
2. Not giving up on making good friends. I found people from a similar website to this in my area and met up for drinks. Several of them became great friends.
3. Getting a new pet. I also had to leave one behind - she was too old and it was too expensive - so I just made sure she had a good home and as harsh as it sounds, I just had to force myself to stop thinking/talking about her because it just made me way too sad. No kitty will ever replace her, but just making plans to get a new one (also one that's both mine AND my boyfriend's) has gotten me really excited.
4. I set up a website and got a digital camera to keep in touch with friends at home - just a little simple blog and a photo page means a lot to people who are used to seeing you and it makes me feel like I'm keeping them entertained.
5. Exploring. It took me a while to get confident about just jumping on a bus or getting on a train, but it's fun!
I do know how hard it is, though. I've been home twice this year, but it is weird to come back here without really knowing when you'll be back. But for what it's worth, on this last trip to California I was really excited after 2 weeks to be coming back here and I really and truly felt like I was going home when I did. Hang in there!