So, this is going to be rather long and thanks ahead of time if you read it all

I am 18 years old (19 in less than a month) and was born a male physically. I have always wished that I was born a girl for as long as I can remember. When I was a kid, some of my best friends were a couple girls that lived in my neighborhood, and I even enjoyed playing Barbie with them too. However, I have not ever really considered that I could be transsexual until just a couple months back. Thinking about it, I think I may have always known in the back of my mind, but didn't accept it because of my dad. He was always very masculine and would do everything in his power to have me be the same. If I ever hurt myself (even if I gashed my leg open) i was told to quit crying and man up. He never let me act anything but completely masculine and I wanted nothing more than to make him happy. Anyway, a couple years back he left and I found out I actually don't know my real father, etc. but that's another story. I now feel like I'm free to be who I am, but I'm scared I will make a life-changing mistake. I really don't know what to think or do. I spend hours every day thinking about it, picturing myself as a female, and asking questions like would I be happy doing this or that, etc. some days I am motivated and want to go out there and start and I'm completely sure it is right, and others I think that it would be much easier to remain how I am and I should just not go through it and be as happy as I can as a guy. I wish more than anything I could have been born a female, I'm just not sure I want everything that comes with being a transsexual. I definitely have a feminine mind, and I won't explain why or this post will turn into a book. Here are the reasons I think I should transition: I hate my guy "parts", I don't like that society expects me to be a huge muscular dude that is rude, I could never have sex with anyone in this body and never want to unless I transition, I feel like I am grouped with guys who are rude and treat girls like trash, I much prefer things like snuggling up with someone I love and watching a movie rather than having sex like all guys seem to want, I usually can't relate to what guys talk about, I prefer female company over male company any day, and I want to feel free to express myself. Now, here are some of the reasons I am hesitant on transitioning: fear or not passing, not much knowledge of the female world (can be learned), I'm 6 ft tall and dont want to stand out, I don't want anyone to outcast me, the money involved, the time it takes, and family and friends leaving. So, I know for certain that I am indeed a girl in mind and spirit, but I'm just worried that after struggling to come out, paying the medical bills, and learning to fit into a whole new society, I will be outcast and it will all go wrong, which will lead me to wishing I had never done it in the first place since my current life isn't terribly miserable, I'm just unhappy with my body is all. (holy commas, Batman!) Anyway, could anyone provide me with some input in what they think? Or maybe if someone had this same problem but went through with it and are completely happy? I guess I'm just in fear of the unknown. Anyway, thanks for reading this if you did and hopefully I can get some thoughts on what to do!