Filip,
Sounds like your parents are being rational. Do what they ask. You should look at both sides. Remeber also, you are young, there is no reason to rush anything. And if your parents truly love you (I'm sure they do) they will not MAKE you make a choice.
Here are a coiuple of things that stick with me.
If the bible saying that you should not eat blood means no blood transfussion, then where in the bible does it say you can use parts of it, but not other parts of the blood. Sorry, I don't believe God is whispering in their ear. If so, then God lied to them about the end coming in 1914 and 1975 and end of the generation, ie TODAY.
Also, if you stay in and get babtized, then decide you no longer accept what is taught, your parent will have to turn their backs on you (shun you). You may receive a letter as i did from my 19 year old daughter. http://www.jehovahs-witness.com/9/74715/1.ashx please take the time to read this.
Whether they want to admit it or not, the WB&TS encourage the seperation of family. They are intolerant of others. If you do not believe as them, they do not accept you.
These are the main reasons jws are considered a cult in France. And in my opinion, why they are outlawed in Russia.
Pleas take your time. There is no rush. I remember when I was a servant in 1983. I was say and hearing, that the end could come as soon as two or three years. The witnesses will be saying this until they die.
Most of all, find peace within yourself.
Bet wishes,
Bryan
Have You Seen My Mother