When was the last time the two of you went on a date? I mean a genuine, dress up a little, leave the baby with grandma, leave discussions about baby at home, go out and have some grown up fun, date. You need it, he needs it. It's a great way to reconnect and/or see where you stand.
On the other extreme: If you've explored every avenue of "couple time" and "let's talk about us" you can think of, it may be time to sit him down in a quiet time and place. Ask one simple question: Do you want to call off the wedding? A straight forward, no nonsense, yes or no type question like that will get his attention.
Some people may think I'm a crazy extremist for this idea, but it has been my experience that sometimes you have to scare a man a little to open his eyes. Also, keep in mind that if you phrase this question simply and do not lead in with something to the tune of "I don't really want to, but do you...", you do no influence him to just say what he thinks you want to hear. Basically, I'm saying you need to force him to be straight with you.