He likes her more than a friend because the sega people said that sonic likes her or loves her but when they get older theyre goona put them together and theyre goona make sonic kiss amy to give his fellings to her in one of there new games
Amy doesnt love sonic, shes obsessed with him, if you were to play all the sonic games starting with sonic adventure DX directors cut, you should see that she is clearly in love/obsessed with him.