Hi I often find I run out of conversation because, having been low for so long my horizons have shrunk and I feel I never have news. I try to get other people to talk about themselves, sometimes easier said than done but takes the pressure off me a bit and people like being listened to. It can be very hard work thinking of things to ask, but at least gets me contact.
May be little help to you, but hope went ok with your visitor. Try not to judge it too harshly as, if you're low, you may only see the worst, but if they came to see you they must see something likeable in you and that's worth thinking on. I try to almost make it a mantra, '_______ wanted to see me, they must see something in me they like'. Best wishes