<human>: Back story - we're a long distance couple who just met IRL, and let's just say our first week was... active. Horizontally. You know what I mean.

Anyway, at the end of one of the days I visited I couldn't get it up. It's the first time this has ever happened to me, and it was so weird - had a semi hard-on before we entered the bedroom, but when I got on top, just... Nothing. It couldn't be maintained and slipped away. We kissed for a while and tried again, but still nothing. 

Now, she's really insecure: She has scars from a car accident and is a bit overweight, and even though it doesn't matter one bit for me (she's so beautiful I can barely take my eyes off) it's a big deal to her. This couples up with her auditory schizofrenia, which is medicated, albeit still hard to deal with, to become a major insecurity in general. She immediately took it as a sign she was unattractive to me and left the bedroom with tears in her eyes. It took half an hour of consoling to make up for it, and even then I think it only turned around because I actually managed to get it up again and love her silly in the end. 

Now, I've heard performance angst can fuck up your, uh, performance at later times, and that is why I've tried to communicate about this several times. Every time I'm semi-blown off with "Even though it was only one time, it was still a time where I wasn't attractive enough" and she changes the subject. In a way, it infuriates me. I don't want to be hand-waved away when I just want to clarify, and frankly I love her so much I don't want to need to reassure like that in the first place.

How can I resolve this?

Can you summarize the given text in a few sentences?
<bot>: lost my boner in front of girlfriend with major insecurities, she won't believe it has nothing to do with her looks.