I'm on antidepressants. Worried about the bed room (nsfw)

As the title says I'm anti depressants. I cannot make myself finish, let alone will my partner be able to. We are more medium distance. I'm at the stage now where I haven't seen her for 4 weeks and I'm seeing her this weekend.

I physically can't finish. My body doesn't even react like it normally would do. I've spoken to her about it before, and she says it's not a problem as long as I feel good. But I'm really worried. She enjoys doing stuff to me but I really won't feel anything.

Is anyone else in a similar situation or on the receiving end of sex on anti depressants because I'm only lost on what to do. And as I've said before. I have spoken to her about it.