<prompt> Human: Im 25, in the USA. Long time listener, first time caller, using a throwaway for obvious reasons, etc. Basically I came into a large-ish inheritance recently of 200,000 US after taxes. Lump sum, no trust or anything. I have it invested in a conservative portfolio of bonds and index funds and Im basically planning on pretending it doesnt exist; letting my nest egg build up for retirement or saving for education or a house or other such large expenditures that may come up in the future. I occasionally allow myself a share of the dividends for a one time purchase here or there, but other than that the money doesnt affect my life.My question is that my girlfriend of 3 years doesnt know about it. In fact, nobody except my family and our lawyer knows about it. I dont especially want to bring it up with her. Not because I dont trust her or anything, but because were both young and relatively poor in terms of income and lifestyle and trying to get our careers up and running, and I dont want to put myself in the position of having to, say, decline a loan to her learned the hard way not to loan to loved ones or having it be something for us to fight about later on. Plus, theres no real guarantee well be together in the years to come, because weve both discussed relocating to different places soon and the relationship might not last the distance. If it comes to marriage or even living together then Ill probably bring it up, but were definitely not there right now.I feel guilty about this, because were honest about everything and its the most important thing to me. But I also feel like its the rational and responsible thing to do. Can anyone give me some input as to whether Im doing the right thing or need to do something else?  <response>: theres no real guarantee well be together in the years to comeThis is when its appropriate to withhold information on your finances. 