No-one.
Atem hasn't shown any love for Anzu in the series, but, I did find a picture of their forever love. I'm a girl who is Atem crazy and I was jealous after I saw it. There's a link below of the picture.
No.
No he doesn't.
There were some hints in the anime they probably do :)
This is not confirmed by Konami or 4Kids. It was only known that Mana was a close childhood friend to Atem and Mahad.
It is unconfirmed by Konami or 4Kids if they were truly "in love". Although, it is known that Mana was a very close childhood friend of Pharaoh ("prince" at the time) Atem. They were often known to be mischievious in their childhood.
Atem Kuol is 5' 10".
Atem
No, Mana does not kiss Atem.
Atem - album - was created in 1973-03.
Valentine Atem was born on 1978-08-26.