How do I explain to my gf that occasionally not being able to get it up (erect) doesn't mean that I am not attracted to her?
I was a virgin until I started dating her, and we've been going out just over a year and a half. A few months ago I went through a period where I wasn't able to get it up about 1/4 to 1/3 of the time. She had been recently diagnosed with a chronic illness and I was really stressed out about it, and combining that with performance anxiety it was really frustrating for both of us. However, after some time it went away and we were back to normal. I know she felt it was because of her, but I tried as hard as I could to convince her it wasn't.
So last night she was really horny and we started making out and went to the bedroom...and I got hard but lost it right as we started having sex. That of course made me focus on it, so I couldn't recover. I wanted to make her cum though, so I tried to go down on her but she refused, and turned over and wouldn't talk to me, and eventually we got into a semi-fight with her crying and saying she doesn't understand why it happens to me. I tried to explain again that it's something that just happens sometimes to guys, and it has nothing to do with her (it doesn't, I am very attracted to her). Once it happens though, it's all I can think about and now I'm even scared for when we next have sex that it will happen again.
We have a healthy sex life, usually 3-4 times per week, never less than twice.
What can I do to help her understand it's not her, and that the best thing to do is just to be understanding and know that it will pass? I think she believes I am not attracted to her, even though this hasn't happened in months and we've had sex dozens of times in between it happening.
I'm really frustrated about it.