Someone Like You by Kayla Faber

Phil Hanson landed in Scotland after a nasty burnout and a despression diagnosis forced him to take a step back from his hectic writer life. His finaceé Abigail, a native Glaswegian, is only too happy to return home after ten years in the States, but Phil has a hard time adjusting to his new life.
That is, until he runs – quite literally – into lan Galloway, a mountain of a man whose witty humour is, if possible, even more charming than his impressive looks.

From fake running buddies to true friends, Phil and lan begin to realise that the bond between them is getting harder and harder to dismiss as simple friendship.