It's perfectly okay to question yourself and your thoughts and to try and consider what the future may hold one way or another.
To answer the question on your subject line "how can I stop being transgender?" ..... honestly, you can't! If you are transgender, then you can somewhat suppress the thoughts and desires to be the opposite gender you were born for awhile (you say you can't shake the thoughts or desire to be female), but the feelings and thoughts will never completely go away and tend to only get stronger and more prevalent as you grow older. If you are simply confused, then the chances are the feelings and thoughts will go away over time. The only way to get a definitive answer and to truely know is to find a certified "gender" psychologist or therapist and go through a few therapy sessions (notice I didn't say just one). You'll need to completely open yourself up and be honest in order to get the right diagonsis.
Being transgender is very difficult and will mostly be one of the hardest things you'll ever have to deal with in your life. Be certain about who you are and what gender you are. If, after proper therapy, you are diagonsed as being transgender, then the eventual coming out is something you'll need to consider and the possible loss of family, friends, and more is a realistic possiblity. However, with proper therapy sessions, a lot of individual research, some well pointed questions and listening to advice given on Susans by many of the valued members, transition is something you can get through and still maintain some assemblance of your family, friends & everything else important to you. It takes a lot of work, planning & preparing, and being very confident in yourself.