So, he is less aggressive as time goes on; it's time to take action...time to forget who is the aggressor. Forget about why. Swallow your pride... you initiate it! If that's the way to get it done, do it! Don't lay there frustrated and thinking that he might make a move sometime or thinking about how he used to be and what possible thing might be wrong about you.
Why torture yourself?
Many guys like it when their mate gets aggressive....it reminds them that they haven't lost their appeal. Attack him just after he's dozed off, or in the living room chair, or on the couch or in the middle of the night if you have to or an hour before he has to get up. Do whatever it takes to get him going. Read my other posts for ideas on foreplay. Use jumper cables if you have to! You can handle it! Rock his socks! It should be the best sex ever for both of you. If you got to do all the work, so what! Try it often. It's your right as a human being to have great sex! You can admit it....you know I'm right. Chew a little spearmint, put on some sexy perfume and a sexy revealing nighty and go for it.