[She understands about the feeling. She wanted so badly this morning to tell Pavel she loves him, but she knows she wasn't sure about that the day before and as much as she feels it today she doesn't know if she'll feel it tomorrow or next week. She doesn't know where she'll be when those memories fade a little more. Her "marriage" to Jack deepened some things in a permanent way, but she doesn't long to be married to him. She doesn't feel like she lost another husband.
She watches him look sadder when she talks about the ease of conversation and part of her wants to reassure him that she likes talking to him, but she doesn't want to confuse the issue. It's not about them. And maybe this is something he needs to see and feel right now for Ianto's sake.]
The person you love the most is the one who can hurt you the most deeply. That can be scary. There were times when Reid would say something when he was angry and if I wasn't me—if I was some outside observer—I'd just see he was hurt and confused and lashing out, but in that moment it would just...destroy me like nothing else could. Because if the person you love most sees you like that...
The point is, that it can be scary even when you trust them and depend on them. You get that, right? Probably feeling some of it now? [Since they did just have a fight and he's obviously questioning himself.]