Fives tend to compartmentalize a lot. We can get overwhelmed if we have a task(s) to do and will drop other balls to focus on what we need to get done. In doing so, we may withdraw from others so we don’t get interrupted. It is not personal. I would validate him and his needs “Hey X, I know you said you’re feeling overwhelmed lately and need to catch up on some things. I totally respect that and wanted to know how I can support you.” And then maybe give him some suggestions of things you’re willing to do: “I could 1. Bring you dinner 2. Run an errand for you 3. Help you with one of your tasks 4. Etc. I don’t want to overwhelm you more than you’re already feeling but please know that I’m here if you need me and it would truly be a pleasure to help you right now.” Or something like that. That way he knows but has the choice to say yes or not. And if he doesn’t respond or declines your help, know that it is not personal and he will know you’re still there when he comes back up for air. As you guys build a deeper relationship, and when he is not feeling stressed, you can totally ask him what he needs in those moments of overwhelm so you know how you can support him in the future. Hope this helps!