<human>: Can you summarize the given text in a few sentences?

I really don't know what to do anymore. 

My gf makes rash serious life decisions (job, education, place to live, etc) with no logical thought behind them and they worry me. She switches her mind daily and will commit to things that the day before she said she never wanted to do/ would never do. She will constantly do the opposite of things she said she wants depending on where she is (home vs away).  

If I want to honestly help and give realistic and logical advice (aka Ron Swanson), my gf will become very upset and we will fight. She complains that I am negative and not happy for her when I should be. However, if I blindly happily support her  (Andy Dwyer) even if I know it is a poor choice and is not best, she will be happy and we won't fight. 

In the past when I have been a Ron Swanson I was usually right and later she realized it but it wasn't without a lot of agony from fighting and her being mad at me. And when she is mad, she will stay mad for long periods of time/ it puts a major strain on the relationship.

She is lost in life and does not have a clear path or any idea of what she wants to do. She will say this half the time and then the other half of the time she is super happy and excited with all of her decisions. 

Who am I supposed to be Andy Dywer and be blindly happy or be Ron Swanson and always make sure loved ones know what I think is best for them even if it means fighting/ problems will most likely develop because of it?
<bot>: Mandatory summary/question! What to do.... be honest and risk getting in a fight/ gf getting very angry or play dumb to ensure she is happy?