What is he thinkng?

ok so Iv'e liked this guy since like 1st grade. his name is dustin. i stopped liking him for a couple a years because i decided he didn't like me at all. we have been pretty good friends. i don't think he still thinks i like him. pretty much everyone in my elementary school including him knew i liked him. now i really like him again. so pretty much I've liked him for about 7 years. I'm now going into the 8th grade. I'm not sure what to do. 1) one of my best friends callan likes him. 2) i don't think he would like me. all the girls he's dated are the girls who are stuck up slutty cheerleaders who think there all that. he's really cute and cool to hang out with but i think his cuteness was obviously noticed by some of the cheerleaders. since he's known me for almost my whole life i don't know if he would ever like me. he's not those no good dirt bags it's just that he hangs out with those stupid 24/7 flirt girls. it would kind of be weird if i asked him out and he said no. awkward. help