Dilemma between 3 girls?

Not to brag but I am a ladies man and a lot of my friends are girls. Any way I don't like commitments so basically I fool around a lot. A lot of girls are mad because when they ask me out I turn them down . But now I have met 3 amazing girls and there is no way I can decide which one I like more and for the first time in my life I think I would be comfortable with dating one of these girls and not fool around on them but that's the problem I can't decide and me and these 3 girls are steadily getting more serious and I know sooner or later one or more of the 3 will ask me out and I don't want to say no but I don't want to have to tell the other 2 I have a gf.