Depression and anxiety can cause ED, so can Hypertension (high blood pressure), elevated "bad" cholesterol, low testosterone, and a huge wad of other, normal things. This is so common among men as the get older (and I don't mean 90!). All you have to do is watch tv to see a million adds for viagara, cialis, etc. Definitely start with your family doc, but also ask about some of the things I mentioned above (hypertension, cholesterol, low testosterone, etc, but also ask about treatment for depression. If you don't get results from your GP, get referrals to specialists in these fields. There's help out there, seek it out!

Above all, don't be embarrassed for speaking openly here; that's what we're all here for, to help and to be helped!