Definitely don't be snappy with her (I cried in front of my H today, don't copy me!).
She won't want someone short with her. I know it's exhausting, but you need to cheerful and confident so she will want to have you in her life.
OMG, your date sounds like a nightmare! I was the opposite with men when I dated ('just sleep with me and then leave', lol). One guy kept asking me to marry him, like he thought because he'd seen me a few times we had to get married! I couldn't make him understand that I was just having fun.