Intimacy after baby

How to get the intimacy back after baby? Never had this problem before, this is baby number four and after our others we were fine after a couple of weeks. This time around we haven't been intimate since halfway through my pregnancy and babygirl is six months, we're talking barely a kiss on the cheek. I've tried to speak to my husband numerous times but he just shrugs it off and says he's busy... Anyone else been thru this?