I think the one most important thing for you is going to get a good therapist, preferably one who specializes in gender issues. Going back and forth and suppressing feelings doesn't work; it worsens everything over time. And yes, telling your parents is important; essential, even.
If your parents are especially religious and zero tolerant, they might react badly, and if you're living with them, you might want to prepare measures in case they kick you out. But it remains relatively rare phenomenon in the 21st century for people to react so badly, in my opinion, at least.
But whatever their reaction is - and it's unlikely to be very negative, I believe - you have to tell them. The very worst, rare scenario is that they don't want to have contacts with you again. But if you think of it, if you never tell them and distance yourself from them to transition, the result is the same, so in practical terms, you don't really have anything to lose by telling them.
Finally, if you are the same "wild flower" who used to post here a few months ago and then left, I must say that knowing your previous irresponsible, dangerous and impulsive decisions, unless some major change has occurred, you'll need to see a psychologist or psychiatrist quickly to get that recurring, major issue of yours looked into before going into transition and similar things.
If you're not, ignore the above paragraph.
