Should I drop out?

I've been at university for a month now and I'm seriously considering going home. I'm struggling to make friends (I've made friends with a couple of people enough to go out for a night out with but not to talk about stuff going out), but most seriously is the fact that I'm not enjoying my course at all, it's not what I was quite expecting and because it's not interesting to me I'm struggling to motivate myself to do the work.
Although I love living in Cardiff and have family nearby, because of the dissapointment with my course and the realisation that the career I thought I wanted I'm no longer interested in I'm worried that I'm not motivated enough to do the work, so will most likely fail anyway, but even if I did continue to the end of the degree it will be meaningless to me.
Should I try and stick it out a bit longer or cut my loses and reduce the cost of this life experience by going home and working out what I really want? Another thing I am considering would be to go stay with my family nearby in Cardiff and work out what I want to do there (possibly apply to become a teacher for next september) or go home to Cornwall. But I've always wanted to live in Cardiff and love the city but I feel like I shouldn't stay with my family in Cardiff until I've decided what I'm going to do.