My dd is again on anti depressants and has given up yet another college course. She is enacting a pattern that has been going on for years now, since secondary school which she left before she entered Yr 11.
I agreed to her leaving school because of the amount of time I was being called into school to mediate between her and teachers and her and other pupils. She became impossible to get up in a morning - I really do mean impossible, as a single mum I had absolutely no way of moving her physically, she was bigger than me and would intimidate me, and my little boy, her baby brother if she didn't get to stay at home or do what she wanted to do.
At this point though I wasn't so aware of how much of a bully she was, it's only hindsight and the fact that it has been going on for years that I can see what she's been doing.
Two years ago she started an introductory Btec diploma in art and design and by the second term she was doing so well she was given an award for her contribution to the course and her commitment. The following sept she started the First Diploma in Art and Design and from what I could see, her relationships with tutors and students began to fail and she gave up at the end of the first term. She spent hours and hours in her bedroom, became argumentative and bullying in the home and started the cycle that she'd set up at school all over again.
DD reinvented herself last year, changing from wanting to be a tattoo artist - the reason for leaving her course which 'wasn't getting her anywhere' to becoming a Young Farmer 
In the September she started an agriculture course and for the first half term was getting on fantastically, loving the work and enjoying getting good marks, then she fell out with some of the girls on the course and with one tutor in particular. DD was so vile to one girl that the girl left the course. Facebooking became a huge problem as what happened at college would continue on into the night over the net and DD made quite a few enemies.
This resulted in DD getting a warning from the college this February that unless she undertook an anger management and went back on anti-depressants she would be kicked off the course. She hasn't been back since and the college have now assumed that she has left the course.
I don't really have much experience with depression but DD's swinging from being idle and insolent to loving and motivated is so extreme that I do not recognise it as depression.
I suspect that she's also been looking at symptoms of depression on the net, and been using search results to make excuses for her not going back to college. eg: she can't stand large crowds or being in a confined space with a number of people - Oooh look, I can't use public transport and can't get to college.
Despite this, she used the megabus to go down to London to visit her Dad two weeks ago and spent every night out with a group of friends she made down there.
Her latest reinvention of herself is into a street-wise, hard edged, hooped ear-ringed South London black girl - her Dad kicked her out after a week and after bumming on sofas for a few days she came home, unannounced and so edgy I wish she wasn't about.
Thursday night I poked my nose into her bedroom to ask her to be a little quieter on web-cam as DS was going to bed, seeing that she hadn't unpacked her case or put away a basket of washing I reminded her about this - MAJOR objection which resulted in her ordering me out of her room and calling me a 'F+ing Prick' 
So I told her that she couldn't talk to me that way, came downstairs and disabled the internet.
HUGE objection (not surprised this time as I knew it would get her attention) I said she could have access if she apologised. DP backed me up and got told not to interfere, I said he was backing me up as he was entitled to do so, being my partner. She threatened to smash up my computer and all the car windows, I told her that if she caused ANY criminal damage I would call the police to which she replied that she could take being arrested and spending a night in a cell just to see my face.
At this point, I rang my mother who has a very good relationship with DD as she doles out money on demand and is in many respects very similar to DD.
Knowing I was on the phone to her Nana, DD retreated upstairs and later left the house. I have not seen or heard from her since. Mum tells me that she's with a friend.
I wish she'd leave for good.