What to do, what to do?

There's this guy Hayden who I like. We're really really good friends and we talk about everything. We have gone out before, but it was just for 4ish days. Yeah I know. Pretty lame, right? Anyway, he's like a lot of people older than himself. For instance, he's 14 and likes a 15 year old. He always needs my help with his girl issues, and recently, even though I've denied that I like him, I found that I did actually like him. Last night I fell asleep really happy because I was going to tell Hayden today that I liked him. Except then he called me, and he told me that he took my advice and likes someone in our grade. When I asked who, he said I knew her really really really really well. I was thinking "Well... is it me?" but did not say that. Then I asked if it was my best friend McKenna, and he said it was. When i asked what he likes about her, he just says "She's pretty, she's nice, she's athletic, and i just like her." I don't know what to do! Today has been a pretty uhh crappy day because everything just turned around. She's pretty, but not THAT pretty as everyone makes her out to be. Yeah I bet I'm jealous that ALL the guys like her, but her "looks and charming personality" have taken away all of the guys I've liked. Not kidding. One guy used me to get closer to her, another one broke up with me to be with her. And now Hayden? Ir eally want to tell him how I feel, but i don't want him getting mad and pitty dating me just so I'm happy. And yes, I am pretty. I have to say that. I'm brown haired, green eyes, perfectly curly hair, and skinny. She's a red head, lots of freckles, blue eyes, plays soccer, and is in good shape as well. I really don't know what to do. Even if it's not Hayden who I date, how do I pick up nice and semi-cute guys without being a complete slut? Any ideas? Please help! BEST ANSWER WILL GET 10 POINTS!