I get by just fine; I lived alone up in Seattle from 1989 through late-2004.
After being evicted for missing a meeting, I moved in with a friend, stayed with him for ~19 months, then moved here after he passed on.
My Rascal's busted; but I got a new Celebrity X3 in early-June of last year; I get to pretty much everywhere I need to go (the drug store, the grocery store, the bank, the park, the Radio Shack, etc.) by driving myself to those places in it.
And yes, I can prepare food for myself, medicate myself, clean myself, do my own wash, feed the kitty cats, clean out their litterbox, etc. so I can indeed manage by myself.