I'm in this position. We are supposed to be getting married, but I'm actually rethinking, and its based on his family. At first it was ok, but slowly got worse and I can't stand them as they are really nasty people (a couple of them are ok, but they definitely have a group mentality of sticking together). I've recently seen them throw another family member , who married into the family, under a bus.
Although DP is on my side, I know if I wasn't in the picture his relationsbhip with his family would be fine. But it isn't me thats caused it, it is all on them, which at least he sees.
It has got to a point where I am thinking how much worse this will be when we're married, as I really want nothing to do with them now after recent behaviour from them. But that just makes me look like the unreasonable one and I think it will cause issues for DP down the line. I don't know if he'll always have my back and if he'll start to resent me for standing my ground against being bullied by them.
Its a difficult one. I think mainly because DP, although on my side now, will not actually tell them how shitty they are being. He just avoids situations to 'keep the peace'. I know if it was my family who did this to DP, I wouldn't just ignore the situations, I'd be calling them out on it. I'd be over there and sorting it all out. His reluctance to actually do that is whats making me rethink.