I agree with the others that 6 months isn't usually a gift-giving occasion (some guys don't even like any sort of dating anniversaries being made a big deal of, they don't consider a dating anniversary on par with a wedding anniversary).
However, the "love languages" thing that others have mentioned was what I was going to say as well. If your "love language" is gifts, and they're important to you, then that's something you should make clear, and the two of you should figure out how to deal with that. Because if you feel loved when you receive gifts and he thinks gifts aren't a big deal (you referenced that in your OP, about him not thinking that birthdays were a big deal), then you're going to feel unloved, even if he's trying to show his feelings for you in a different manner.
My husband's brother is very much one whose love language is gifts. They're important to him. He likes new stuff, name brands, doesn't like hand-me-downs even for his kids, etc. My husband and I are totally the opposite. Nonetheless, we know that to *him*, new, nice gifts are an expression of love. So we bite the bullet and go overboard (as necessary) with nice namebrand stuff for him for gift-giving occasions (and they even do gifts for Easter, Thanksgiving, and sometimes just because they haven't seen us a for a while). It's their way of knowing that we love them.
So even if your boyfriend isn't big on gift-giving, I think it might be a good time to talk about expectations, especially as your birthday was six months ago and Christmas is a few months away (because it gives you guys plenty of time to discuss it, and him plenty of time to think about it without the pressure or feeling like you're hinting for stuff right now).