<human>: Condense the text into a few key points

I met this girl a while ago. The first time I saw her I immediately knew I had to take her out. Since then we have been on quite a few dates. I tried to come up with some fun and romantic date ideas. She likes it when I just arrange something instead of discussing what we should do. 

I am starting to really like this girl. When I first asked her out she told me that she didn't want to jump too fast in a relationship. Last week I tried to tell her that I respect her opinion but that I am in it for a serious relationship. She said that at first she did not want jump into anything, but now that she knows me better that has changed a bit. She likes how it is going between us. I told her that there is no rush but that I just wanted her to know my opinion. I am patient but I want us to be on the same page. 

In a few days is our next date. I told her that I would come up with something nice. I am planning a romantic date for us and I want to give her a little something. She loves chocolate so I bought her a little box of some very tasty chocolates. I made this heart shaped origami to put on the box. Now, what little sweet and subtle scentence could I write on it to tell her I really like her? It has to be sweet but not too obtrusive.

Also, how long should I wait with bringing up the serious relation thing again? After how long is it normal to make it official? And how should I bring this up and ask her?
<bot>: Really liking a girl, what sweet message can I write on a small gift? When should I ask her about a serious relationship?