I have turkish boyfriend but I'm so afraid to talk or to think about marry with him because it look like a dream, build castle in the air. If Buddhist girl wanna marry with muslim guy in Turkey, what will be happened later? Do I have to change religion to be muslim? It would be appreciated if you have experience or heard anything about this before. Please advice me, thanks alot

Yes You must be muslim.

Changing your religion will depend on your boyfriend's views. His family might influence this issue also. I mean if they are very religious then you will most likely be asked to convert to Islam, but if they are more openminded it won't matter much if you decide to remain a Buddhist. I suggest you discuss this matter with your boyfriend. Ask him how he honestly feels about your religious beliefs.

Ohh no, you dont understand,its acceptable for Muslims to marry Christian or Jewish only,i mean not forbidden.

You can't change your religion for somebody. It's crazy. If you are Bhuddist it means you believe this religion. If you change what you believe for someone else, you are not true to yourself. And most of all, you cannot lie to God. If you believe in something, surely what you believe about God is more important than what your boyfriend believes in. This issue isn't something about culture differences. Being true to your religion is a very different matter.

If I know good, Muslim can marry with somebady who believes in one God, so Muslim can marry with Muslim, with Christian or with Jew. Of course if they are more religous, they want (his family) marriage only with other Muslim. As every realigous people they worry about future belief their grandchildren, and belief their son. You should ask your boyfriend about answer, because somebady often says "it's not important, all people believe in the same God or our kids will choose their belief when they will be adult" but really it isn't so "pink" and it's not true. Everything looks so easy only for start. Good luck!

In fact, muslim men are allowed to marry a girl who is monotheist (who believes in one god), they are not allowed to marry with an atheist, or with a buddhist, but he can marry with a christian, jewish, or even deist (who doesn't believe in religions but believe in one God).
On the other hand, muslim girls are only allowed to marry muslim boys.
But it depends how much you're engaged to the islamic rules.