I feel like such a failure

It's hard to know where to start.. I recently completed a course to qualify as a Primary Teacher. I found the course very stressful and difficult as I went back as a mature student and much of the study was by distance education as well as on sites and a 3 week residential course.

Anyway the most stressful part of the course was interacting with the other students. I felt like I was back at school and felt all the old insecurities as the 'popular' group got together and other groups got together but I felt like an outsider - one of the oldest but not married or not at that place that one is expected to be at a particular age. I did make some friends towards the end but I feel that they really only feel sorry for me and that's why they befriended me.

The course is now over and this group got together Friday night. Three out of the group of six have got temporary work, two are getting regular supply work and I'm the only one I feel who's getting very little work. I now feel that I'm not a good teacher which added to feeling tolerated rather than liked, its very negative. I've had difficulty with behaviour management in the classroom and have felt out of my depth but find it hard to ask for help when I'm older. I'm feeling really sensitive and cry at the least thing lately. I don't really have any close friends now, I did in the past but now we don't see each other much.

Another thing is that I'm renting a house in the country. It's not that far from some of my family but I do feel isolated in the sense that I have to drive to go anywhere. I'm debating whether I should move but am thinking I should wait till I get some kind of regular work - basically my life is a mess right now.

I'm not in a relationship either so I feel very much alone.
Any advice would be welcome.