DP has an ex/ex FWB. She is younger and prettier etc and whilst I have met her and spent some time with her I just can't warm to her. She has been pretty unfriendly towards me and I can't be dealing with it. However, DP has a "soft spot" for her and thinks I'm being an arsehole for disliking her. So how can I get over it. Is this a fake it until you make it situation?