Try breaking it down to specific things. I don’t like Mrs Bloggs next door because she’s a gossip, I don’t like the view from the window because it’s dull, I don’t like the kitchen because it’s too small etc. Then for each one, write down one thing you can do to address that. For example, ask Mrs Bloggs to introduce me to Mrs X two doors along, put a row of flower bulbs in pots on the windowsill, take the kitchen stuff I don’t need any more to Oxfam. Try to do one positive thing each day to address something specific you don’t like, and then cross it off your list.
Old people are often much more interesting than younger people. They have had experiences, lived interesting lives, gained wisdom - get to know them and forget the age thing. It’s just as ageist to dismiss people as friends because of their age as it is to discriminate against them in the workplace!