I'm in love with my best friend.?

Ok my best friend's name is Logan and I really like him. Before Christmas,I couldn't even talk to him but now we've become best friends along with another guy named Daniel and a girl named Hunter. At our Valentines Dance Logan's girlfriend,Kaylee, kept taking Logan away from Daniel, Hunter, and I. I can't stand Kaylee but I deal with her because I love Logan. I want to know how to tell Logan I like him and us still be friends.(Or even more but he does have Kaylee and there on and off like a freaking light switch! But he said he wasn't dumping her this time but she might dump him. And they also got in an argument halfway through the dance but were slow dancing at the end of the whole night.) We have EVERY SINGLE CL TOGETHER, from P.E. first period to English last period. All four of us eat lunch together and crack up laughing and Kaylee always gives me the evil eye because Logan and I are the jokers in the group and she hates Hunter and I because I guess she doesn't want Logan around two girls. I dream about him every night and I have deep feelings about him.WHAT DO I DO? (BTW:I have his cell number but IDK if Kaylee goes through his phone or anything like that. And yes I am a girl!) Oh and I've always been into Logan ever since like 3rd grade and now we're in 7th and I really love him God must have put him here for me because we have SO MANY THINGS IN COMMON(is that bad?) For EX. our b-day exact same month, same day, same hour and same min.(Mar.20 at 5:22 pm) and we always get paired together for cl projects,we same music, Books, cles, interests,ect. or is that like best friends sup-post to be like because my other best friend like Hunter, and Daniel don't have NOTHING IN COMMON!!!!!