everyone here has given you wonderful advice!
I would definately say that if you want it, you should definately try again. Not everyone here found their greek homes during their first recruitment! Some have went through rush 1, 2, or even 3 times before finding the house of their dreams.
If you don't decide to go through rush again, you may always wonder 'what might have been' if you had decided to rush again and perhaps finding your home.
I was a transfer student to my current school, and debated long about trying out formal recruitment my first semester. I decided not to, partly because I wouldn't be able to move until the middle of recruitment week, but as soon as Spring semester came around, I was calling the Greek Affairs office to see if any sororities would be holding informal, and eventually joined my sorority and absolutely loved it! I was also a junior at the time, and had also just changed majors, so I would be around longer than just my senior year.
I would definately say go for it - whether you decide formal or informal is right for you - because you never know what may happen!
Best wishes to you collegegrl!