The guy I started seeing ( I think ) has trouble getting hard due to being on anti depressants. What are some things I can do help him not feel uncomfortable about this? And are there things I can do to help satisfy him?

So I started seeing a guy recently and he's told me he has extreme depression. I'm not sure what medication he is on but I think this could be why he doesnt get hard during sexy time. I've given him head and he still cums, it's just very soft during all this. He hasn't brought it up so I just wanted to help with how I should go about this. So I bring it up and talk about it? Do I just continue to work with his soft penis until hopefully it gets hard? I don't want to make if feel uncomfortable and I'm still getting satisfied in other ways, I Just want to satisfy him the best I can. Any help is appreciated! ( or is it me? Could he be not attracted to me?! )