This is a sweet novel. If you liked The Rosie Project, and Eleanor Oliphant, then this will also appeal. And that would be my only criticism, in as much as there seem to be so many novels being written from the perspective of someone who is not coping well with their world, so behave in an unusual, or quirky, way.
Having said that, Sam is likely indeed and the reader hopes that he will overcome his reservations enough to ‘get the girl’. I loved Sam’s friends, who stick with him, even when they are repeatedly rebuffed by Sam. They are the sort of friends we all need to be watching our backs.
An easy, and enjoyable read - recommended.