Hang on!
You've got loads of determination and personality and openness to new experiences from what I can see.
You're sticking to this diet (when the vast majority of people who start a VLCD stop, we just don't see so many of them on this board-would love to know the statistics),
you're a Mum to three kids who it sounds like, love you and love your company, whilst at the same time holding down a job, yesterday you came to a comedy workshop and were quick and creative and joined in brilliantly.
You are NOT going to be on your own forever if you don't want to be.
You're attractive and nice, and even if you have problems seeing it, you're becoming slimmer by the day, from a starting point of not actually being very overweight to start with.
You've just had a real emotional blow with this bloke, but as Chicken said, it's overall a good thing that someone like him isn't in your life because he didn't treat you in the way you deserved; ie- being caring, supportive, consistent and loyal.
It sounds like sometimes you feel very down and low, then you pick yourself up again and feel better. I dunno if it would help at all, but maybe you could accept that you are up and down at the moment- and that when you're down, that's how you're feeling, and go with it, and feel it, but also, an up is on it's way.
Also- do you know who I think was your Guardian Angel yesterday?
You.
You knew you were going to be feeling sad and lonely, so you got out of the house and did something new. Good on you- you were saving yourself. You've got loads of strength in there. I'd love to see you do an assertiveness course at college or something- helping you to say "no" when you want to and also feel more confident about what you want.
Sounds like you want to be happier, less lonely and with a more fulfilling life- I KNOW with your attitude that you can have all that if you'll let yourself believe you're worth it. Cos you ARE!.