Hello, Lonesomedove! Thank you for the first installment of your cry for help. I say "first installment" because, having had no one with whom to really speak, I suppose you have a lot more to share. We can't replace a flesh-and-blood friend, but we're here to listen (read).
Yes. Your 90-year-old father most probably can never serve as the friend and companion you need.
Is this because of the depression itself, life events/traumas, agoraphobia, illnesses, something else? (No need to answer; just trying to throw some thought at your isolation.) You have been used and deceived -- that may be explanation enough.

I wish you well, and please keep posting.