Board Thread:General Discussion/@comment-27056607-20151008232518/@comment-679780-20151012214709

Demon heart 5 wrote: She is obsessed with sonic but why exactly Demon heart 5 wrote: I mean cmon sonic she won't hurt you I think it's simply that Sonic doesn't want to commit. He does like Amy, just doesn't openly tell her how much she likes her because he knows it will go to her head and would make her persist.

She goes on about marriage and to any bachelour, that means to be "tied down", and for someone who is as fast and free as Sonic, he doesn't want any of that.

Plus, Amy's canon age is 12 so she is a minor. So is Sonic who is 15 but probably knows she less understand the issues of marriage itself which is why he chooses to avoid her.