Hope you realize that should you break up with him in the future. He would still be legally have a share in your property if his name is on the tiltle deed.
My friend's case: his husband own credit card loan and finally went bankrupt. Fortunately the house is under the wife's name, otherwise the bank will make them sell the house to repay debt, even the husband NEVER pay a buck.
Another case: my rich uncle loves his wife so much, and his wife took good care of him at that time. My uncle gave lots of $$ to his wife. Now he regretted.
Besides, if your bf really loves you, he won't mind you not putting his name under the deed. It a way to give you a sense of security.
Love is blind, but there are too many temptation in this world. Just in case something unexpected happens... so it's better play safe.
Anyway wish you have a happy marriage that lasts forever la!