Oh, gosh, ya got me. I'm alone after 15 years with a guy. I'm absolutely clueless and I'm pretty intimidated about the M-F thing.

I think he is giving you a kind of mixed signal here. I know that the colors of roses are supposed to have specific meanings -- I would presume that white indicates the chasteness of the relationship and he wanted to show you how much he thought of you. Still, I would have a very hard time not reading a lot into it.

I hope others will be able to suggest how to get the balance you need here.