How do I help my daughter understand this new phase in her childhood?

My daughter is almost 5. She is not a tom boy, but she enjoys playing with boys more than she does girls her age. I think it's because up until she was 3 she interacted with boys more than girls, every setting she was in she was almost always the only girl just out of coincidence. She's getting to the age where the boys are thinking "ewww girls" but she hasn't reached that "yucky boys" phase yet. She keeps trying to interact with the little boys but they just shoot her down every time, poor thing. Is there a way for me to explain this to her without her feelings getting hurt? I don't want her to think she can't play with boys at all, because I don't think that is the solution.