My husband's grandma married a guy in his 90s when she was in her 80s. It all went down very fast and they didn't have a fancy wedding or anything, took the family completely by surprise. He was a really cool dude (a good policeman who dealt with the mob when mob's were at their peak and corrupting whole cities). They only had a few years together before he died though. So, yeah, if you're that age and you take an interest in someone... there's no reason to hold back. Indecision just means you're wasting the precious time left in each other's life.