How can I make my life more "interesting" under these conditions?

Ok, I'm a single mom in my 40s (never married) who has a small business and takes care of her parents (one lives at home and the other at the nursing home). My mom, child and I have been going to visit my dad at the nursing home every night for an entire year because he's lonely and the staff can barely manage him during the day. He has Alzheimers so when we're with him, it's not interesting anymore because his conversations really don't make sense anymore. I feel bad saying this, but it's true. Anyway, I'm starting to feel as though I'm in a rut and not motivated. I'm running out of things to say to people when I meet them and just feel "empty" inside. I try to meet some friends for coffee, but that's about it. I miss my old life when I was so carefree. How can I make it more interesting? I'm not seeing anyone right now, but I'm dying for someone to sweep me off my feet and take me out for a night on the town. I love getting dressed up, but I'm always in casual clothing and I feel as though I'm invisible. Help!