Just a little background on me for context, I've been in the army reserve driving trucks for about eight years, I have a bachelors in aeropsace engineering and work coordinating the maintenance of about 25 schools.

We have been going out for about six months and are just about to move in together. We were having an argument about a frame we are going to install and I was trying to explain that you can't use dry wall to support anything too heavy. She immediately says "well you didn't study construction did you?" and "when did you become such a pro?".

While she is right, I am not an expert by any means in any trade, I still have some contextual knowledge of building, as I feel most men do. But with my engineering background I have an understanding of structures and my current job I deal with contractors doing this sort of work all the time. On the other hand, my girlfriend was a professional dancer and now works in fashion.

Anyway, I feel like I'm trying to justify my position too much.

This isn't the first time she has said things like this to me. Anytime I try to talk about anything that I am not officially qualified in, I get similar responses where my opinion is totally undercut. Sometimes it happens with things I do have qualifications in. It makes me feel really disrespected.

How do I deal with my girlfriend being dismissive of what I know? Am I in the wrong? Am I too much of a know-it-all? (totally possible) Am I being dismissive of my girlfriends cautiousness? Can dry wall support heavier frames?

Any help is appreciated.