In a brotherly type way? Yeah, you can see that SEGA references them as unofficial brothers in numerous of the Sonic game manuals like Sonic Heroes and Sonic Advance 3, and you can see them act like it in a few of the TV shows.
In a romantic type way? No, except for people who draw art and write fanfictions where they do :P
That may be true as SEGA has annouced that they may be dating in future games
In a brotherly type way sure, but not in a romantic type way.
No Amy is in love with Sonic(Sonic likes her also) and tails might like Cream
no, Amy likes sonic and tails likes cosmo
he loves adventure and danger acording to tails in sonic x
Amy set up a love trap for sonic and tails and cosmo got stuck in it.
were did 3 tails get there tails from
yes. in a Japanese version of an sonic x episode where cosmo dies tails told her he loved her
cream does love tails and tails loves cream
no tails does not live with sonic.
Yes they love each other.
12: Sonic the Hedgehog Sonic the Hedgehog 2 Sonic Chaos/Sonic & Tails Sonic the Hedgehog Spinball Dr. Robotnik's Mean Bean Machine Sonic Drift Sonic Triple Trouble/Sonic & Tails 2 Sonic Drift 2 Tails Adventure Sonic Labyrinth Tails' Skypatrol Sonic Blast
they never show but they show when sonic meets tails, but you can go to Google and go to videos and write how did sonic meet Amy and mabie they show ya.
Tails is 4 and a half from the Sonic Wiki page. Sonic is about 11 because Tails is 8 in Sonic X and Sonic is 15 in Sonic X.