Well, it could be that Amy and Matthew started as friends. Maybe they were classmates or worked together. As time passed, they realized that their friendship was turning into something more. There might be some sweet moments like sharing secrets, going for long walks together. And through all these experiences, love blossomed between them in 'amy and matthew a love story'.
Amy Rose shows her love by constantly chasing Sonic. She is always by his side during his adventures, ready to help. For example, she'll bring him a meal or offer to patch up his wounds.
To be honest, I don't know of any particular comic that has Amy Klobuchar as a character. Maybe it's a niche or rare comic that hasn't gained widespread attention.
You can find them on fanfiction websites like Archive of Our Own (AO3). It has a large collection of Sonic - related fanfictions, including those about Shadow and Amy's love. Just use the search bar and type in relevant keywords.