Most Helpful Guy
Guys love it! It takes a lot of courage to approach someone which is why a lot of guys have trouble doing it and when a girl does it it's a breath of fresh air. Even when I am not interested in a girl and she approaches me I try to have at least somewhat of a conversation with her, or if I do have to go leave without making her look rejected or hurt her social rep in any way because I know how difficult it is to do that.
That being said when you do approach a guy and they do reject you it is easy to brush it off as you were just trying to be friendly. Just go up to him and say anything like a small lititle compliment then a "how was your day?" And go from there