My boyfriend’s daughter's nickname for me is giant overdressed cow. They are very rude to me.

You're not overreacting. I've been in a relatively similar situation and I've known of others who've had to live within a situation they were unable to change due to the people involved.

It makes a person miserable and even though you're putting on a brave face, your boyfriend should recognise your righteous upset, put his daughters straight, and make it known that HE is angry with them, demand apologies and let them know in no uncertain terms that it won't be tolerated in the future.

The problem is, a father with two daughters. They've got him wrapped around their little fingers. The fact is that it is HIS responsibility to sort this out. You are not at fault, so why should you suffer? If he's not prepared to man up and deal with his daughters' rude behaviour, he is devaluing you, and therefore, the importance of your relationship. In which case, he's not good enough for you. Harsh but true.

If he continues to ignore this, it allows them to escalate their bad behaviour, as they're obviously pushing boundaries, banking on your relationship cracking before he steps up and puts them in their place. The remaining options available to you are:-

1) Put your foot down, ultimatum style, If boyfriend doesn't deal with it...(A following threat has to be inferred and followed through if he doesn't) ...relationship is over. Ideally, you would have to be confident enough in your relationship to use this bomb tactic.

2) Sever the relationship and get on with your life. It's always messy to one degree or another but if things don't change, it's the sensible option.

There is also your son to consider. His well being and respect for you are to be considered paramount and I'm sure he would rather you stand tall and make a decision than let slide the unchecked disrespect of your boyfriend's badly behaved daughters.

Also, if your stature appears intimidating to others, it is the 'others' perception of you that allows them to be intimidated. The fault does not lie with you. You are six feet tall. Stand proud and do not slump or do the 'goofy thing', diminishing yourself by pandering to the whims of others. It presents visually as having low self confidence and people will use it to take advantage of your good nature. You will know when and where you can relax and have fun. Otherwise, if you have business to deal with or people who are undeserving of your concern for their feelings, stand tall, be you, be six feet tall and tell them straight exactly as it is.

There is, on occasion, a necessity to intimidate as a useful defence mechanism. Otherwise, standing straight, looking people in the eye, clearly and firmly stating your wishes in an even tone and without apology is assertiveness. There are clear differences between assertion and aggression. Standing straight aids a feeling of self confidence. To intimidate is to deliberately instil fear in others to leverage a desired outcome and I really don't think you do that.

Sorry this has been long. It was quite a post to address. I have maybe overdone it but hopefully, it will be of some help.

Ps. Regarding your appearance...I've seen your photo and you look bloody great! Take no notice of anyone who says otherwise. Good luck!