Matt did a lot of kissing with Great cause that's her BFF but I think she kissed Film too? Unless it was camera angles. But I don't think she's oppose to kissing though.
As for real or not it is pretty much up to the actors/actresses. Some will not do real kissing scenes no matter what (which I find lame cause you are getting paid to act and kissing is part of your job description).
If it was Hollywood or other entertainment industry if a scene required for you to do something and you be like...yeah, I don't want to do it cause I don't believe in doing so. They probably point to the door and says, don't let it hit you in the ass lol.
When I watch a Taiwanese/Chinese/K-dramas sometimes you anticipate the kissing scenes hahaha some are so long or real. Then you have Thai industry where before the lips touched they pan out to the walls, the ceiling some other things beside the actual couple lol. And if we are lucky enough to see two heads together, we can be rewarded by the pra'ek thumb