Just out of curiosity if you snitch on Gunnar then apologize does it still leave a bad impact in his relationship with you?
Hmm... try to make him happy in all possible interactions?
Like sucking his dick while helping Bernard the whole day in the shop, or sucking it in front of Torben's house, 'watching' fireworks, roaming the fair and Northcrest residential area..
Oh you can also miss an interaction with him if you didn't check the building progress part for more houses plenty of times..
Hope this helps.