Well I've been a lurker on here for a while, and I finally got the courage and sense to post so I could get your advice.

Well, ever since I can remember, I always had girl friends, and played with them, most of the time doing girly games and stuff. Heck, my mum has a picture of me pushing a pram at 4. Anyway....
When I was about 14 I went through a phase of trying on my sister's and mum's clothes, and I felt comfortable. Relaxed. I felt like I wanted to be a girl. I thought it would have suited me better. But then, I grew out of it, or so I thought.
The past few months, I've been depressed, sometimes suicidal, at how rubbish my life is. My family is going through tough times, and so am I. At first I put it down to school, and how tough it was, and how annoying my friends are, but then it hit me the other day. At school, whenever I look at the girls, I don't think I want be their boyfriend, I admire them in another way. I sit there thinking 'I want to be them', have a figure like them, do girly stuff. I sit and look at my penis wishing it just would go away. I feel like a girl. Sometimes I have to curb mannerisms I feel like I should do naturally. And I've always sat to pee for as long as I can remember.
Right now my parents are out, and I'm sat in my sister's clothes, and oncemore I feel relaxed. At home.
I just don't know what to do though. I have a girlfriend, and I haven't gone off the idea of being attracted to women, I just feel like I should be one. I want to be pretty and able to express myself more freely.
What do you lovely people think? Am I transsexual?
Edit ~ Kate