Responses
I agree with kags here. While yes I think they're putting too much into the romance but there is no sexualization going on here. It's just childish, clumsy affection. It's a little too much at times but little boys can be just as pushy.
But it's Not sexual in anyway.
I think you're confusing the uncomfortableness of his pushiness with sexualization and seduction and those are just too different things.

Its weird how author decided to make the prince so fucking weird? Why is a kid seductive to another kid, and why is he so informed about likibg the other gender when he doesnt look aa year older than the MC, he could be 8-11 years old.
Maturity is one thing but it feels weird for the children to be sexualized when theyre supposed to be all food and play at that given age.