A question for women between age 25 and 30 about messing up the first date?

I am a 22 year old male whose mom set up on a date with one of her 26 y/o co-workers. The mom my mom told me she wanted me to meet her, j immediately thought "this is going to be ridiculous." In august I'm moving to California so I thought of it as a ploy to get me to stay in in the current place I live. So I started programming myself to text like a meany and be a horribly disinterested and boring person (which is very unlike me) on our first date which went swingingly as planned. Well, she turned out to be an amazing woman whom was EXTREMELY interested in me and whom I am now enamored with and want to date again, only show my true self this time. Problem is, I'm very sure she hates my guts now. She said before the date that if we clicked, we would go to the beach..which we didn't. Plus, her texts are monsyllabic and she won't pick up when I call. I realized how childish and selfish what i did was, and have really beat myself up for it. Ladies, how do you think I should go about getting another chance? I thought about going to pick up a bouquet of flowers and a peace lily for her and apologizing and telling her the truth. What do you think? Is that too much? Too little? Have I blown it? All input welcome.