Ecophobia

Ecophobia: an abnormal fear of home surroundings.

Ruaridh has ecophobia, a fear of home.
Ryan has a fear of losing Ruaridh to the horrible disease which is ecophobia.

Ruaridh needs Ryan's help and Ryan needs not to let go of Ruaridh.

*This is a slash. Don't like, don't read, simple.*