Where is the love?

Why is it so hard for guys to understand that girls LOVE to get flowers? My boyfriend doesn't understand the concept. We've been together for basically 4 years, and he's only bought me one thing of flowers (carnations), from wal*mart, that cost $3; and the only reason why he bought them was because I was really upset with him about something. Now, I'm not saying that I didn't appreciate them, because I really really did. I loved them. I took pictures with them. I told everyone about them. I didn't care that he got them from wal*mart instead of having them delivered. I didn't care that they were only $3 instead of $50 (I wouldn't want him to spend that much anyway). So why is it soooo hard for him to run by wal*mart every so often and pick up a thing of flowers for me, just to show me he loves me? Yeah, they die? So what? They are nice to get, and if he knows I like/want them, then why does it matter? I just do not get it. If he knows they make me happy, then why wouldn't he want to get me some? I don't want to sound superficial or anything, but COME ON!!!! What kind of girl doesn't like getting flowers?