So tell me this

Why is it that whenever i like a guy, they always turn me down? I mean really peoples. I have feelings too. I have had this happen to me way to much now. Frankly, im getting sick of it. Im sick of the fact that i see couples in the hallway and they are all cuddly and shit. It makes me sick. I want a guy who will be there for me. A guy that will understand me when i need to talk to him. A guy that wont go off and cheat on me with some bimbo. But my question for everyone out there. Is that kind of guy out there? Please just let me know!