If you still want things to work out, let him him stew in his own juices and take action when he's ready. Work on yourself and continue to detach.
But if you've reached a point (and only you know this) where you are ready to push things forward yourself, get a L and have him served. Otherwise he will keep you trapped in limbo.
Me-47,XW-43 S13,S16 M:18 BD:4-23-17 W filed:7-17-17 (5 months of in-house separation hell) W moved out:1-6-18 D granted:2-15-18 Decree signed:3-29-18