If a 7-year old boy kissed a girl on the playground it would be adorable. If a 7-year old boy came out of the closet people get offended or concerned. Truth is his brain isn't even capable to process the complicated emotions that come with "liking" someone of either gender (he's mimicing behavior that he likes).
At this age the two hemispheres of the brain are still physically separated. He is learning and perfecting language, communication and motor skills that will soon help him navigate the emotional world. What is important is that his parents continue to show him excitement and enthusiasm for these non dangerous behaviors (because that is REALLY he is expressing, no sexual or romantic intent in his brain). Once he has reached the point in his life that he can navigate the more complex aspects of life he will be more prepared to be a strong blaine/kurt high schooler and I HOPE that I have students like him in my classroom
That's my long way of saying "go mom!"