I'm only 15 but my parents have talked to me about this topic. You are allowed to marry him, but it will put both of you in a rough position because he is required to raise all of your children as Muslims. Also if you do not convert to Islam don't expect his parents to be very nice to you lol....Arabs. But seriously you should look into Islam. It will change your life in so Many ways for the better. No one is forcing you to become Muslim, just look into it and ask the man you love to teach you about it. Good luck.