My girlfriend doesn't trust my decisions

Hi All, I am currently going through a bit of a problem in my relationship. It started out as a problem with me buying a new car, and it ended up with my girlfriend (of 4 years) telling me that she was worried that "down the road, if we had a mortgage, and children, etc. that I would do something stupid". The truth is I am a bit of a risk taker, I consider them to be calculated risks, but this isn't the first time she has said this to me. She is very risk averse and likes to have everything controlled. 18 months ago I decided to give up my job and do a Phd. I was 26 at the time and this is something I've always aimed to do, and after the death of my father realised that life was too short not to be ambitious. At this time my girlfriend also made the "down the line, you could do something rash" remark. It turns out that the Phd is going well, I am one of the only fully funded phd students in our college and have provisionally been offered post-doc work. I guess the problem I have, is that I feel so alone, I bet on myself to succeed and take chances (which normally work out), but I find it so insulting that she doesn't believe in me... (Even writing this down has helped)... any advice is welcome

Honestly, I can't really blame her for being worried. I think the two of you should sit down and have an adult conversation about this. Maybe try and make a few more large rash decisions. Even if odds usually work in your favor, if she is a thought out person, it will make her feel more comfortable if you think things through more or at least talk them over first. Also, maybe while you're talking tell her that acting on impulse once in awhile might not be such a bad thing. It may bring a little excitement, and a good compromise for the both of you.