I'm not NT so she probably wouldn't notice if my personality is that great or not, but I'd be a very lovely, caring and trustful partner, just like my mom is to our family. She could be sure that I'd never let her down, I'd never take decisions or actions that I think it may cause harm or make her suffer. Because that's who I am, I'm very empathetic. I'd make sure she feels loved and be always there to confort her. I know what is like when someone despise you or make fun of you, when life gets overwhelming.
I'd make sure we can work out on our insecurities and have a good time despite of it, and if we can't we don't have to anyways, we'd love each other anyways, as long as we're together things will be fine.