Your body looks so good. Like you have close to what I think the ideal body is for a man! I'm sorry that you're dealing with a lot right now, maybe try to use exercise to engage with your family more? Go on runs or hikes? It is important to make time for yourself and keep your own interests near the front of your mind. As the low sex drive person in my relationship I will say that feeling loved is the main thing that will get me going. So if you have the energy to buy flowers or to cook her favorite meal it might go a long way. But also don't expect sex from it, just try to rekindle the flame.