I was in a somewhat similar situation to you a few years back: hadn't had the best social experience at school, climbed out of my shell during university, managed to get decent grades but didn't have the foggiest about what I wanted to do after graduation.
I felt quite bad about this, I think the saddest thing about the time we live in is that everything is so bloody career orientated. You can't just sit back and enjoy three years of learning and discussion, it all has to help you pursue some kind of goal! A number of my friends lusted after grad schemes. For various reasons including apathy, a ****ty CV and a desire to do something slightly different I didn't. After graduating I got myself a job working in a school as an unqualified teacher. For a while I thought I wanted to jump straight into teacher training, but upon reflection, a few months later I decided I wanted to get a bit more clever and study some more. I applied for a History MA at UCL which I am due to begin in October.
I suppose the point I want to make is that it's really difficult to plan ahead. You are a year away from graduation and in that time you don't know what your priorities will be, what you will be doing or where you will be going. Go with the flow, and in the mean time seek out volunteering, internships or work which could help boost your CV. Also, use the time you have over the summer to research graduate pathways and perhaps find jobs which you'd be interested. This will hopefully make you feel more confident about the months and years ahead.