I see that you have three sons, start making plans and doing things with them. Always have something to do, and they don't have to be big and extraordinary, just well thought out plans.
Keep doing it and planning ahead. Once you get some momentum you may invite your wife, but don't make the plans about her and make sure her answer about going or not does not change your plans.
Can't agree with this enough.
H: 43 W: 37 M: 11 years T: 12 years S: 11 D: 8 ILYBINILWY, "I want to move out" and "I want a divorce": 3/23/14 MC started: 9/22/14 Affair and past infidelity discovered: 9/26/14 Piecing: 10/20/14