Sex after baby...I just don't want it

So my baby is almost 6 weeks old and my husband is chomping at the bit to have sex. Here's the problem...I don't feel the same way. After I got pregnant I just haven't had a sex drive at all. Don't get me wrong, I love my husband and seeing him with my child makes my heart melt, I just don't want to have sex and it worries me...I've told him I want him to do more than just say "let's have sex" I want him to "woo" me, is that too much to ask? Our sex life is so boring and I think that's the problem...we make out a little bit then he climbs on top and we have sex, the end. I've told him we can try different positions, that I want more passion. I'm just not looking forward to the same old thing. What do I do, just give in and open my legs and say "have fun"? We've only been married a year, I'm worried this will be my life from now on.