who's the guy he runs into on the bus?

We don’t know yet, we’ll see in season 2

*season 3

I think it's the guy in glasses the one that put the boss on debt

during the first couples vacation there was a scene where the orange hair looked back at the past, so I think nit might be an ex of his... (ch 21)

I think you might be right.
When try to re-read again, i though like you too

it was when they were looking at their I.D's :)