Should I say anything? 10 points?

I like this guy who worked in the same place I was working for the summer. Sadly I am leaving since my contract was a two month summer job. He has asked me to breaks and lunch he paid twice and the last time he didn't. but talked about how he bad money management. He stood me up, but I called him out on it and he apologized. I;m not really sure if he treats me any differently then other girls he knows. Anyway this week may be the last week I see him. And I know I can't flat out say I like you. But I'm going to say goodbye lol I know this is high school. But Is there anything I can say that shows I'm interested..or make a hint. I just don't want to go with regrets of not saying anything