Self pity is not necessarily a bad thing. It's acknowledging a need that you have. And grieving that the way you used to fill that need is now gone.
I would hazard a guess that it's been a long time since you acknowledged that as you're more often thinking of the needs of others first.
I love that you challenged yourself to post one good thing every day, but I challenge you to go one step further to also post one thing you did for yourself every day.
It could be very simple things to start with, like I made myself a cup of tea and sat down and read a magazine, watched a programme or whatever you enjoy.
Even if you don't do it in this thread, it will make you start thinking more about your own needs.
Once you start remembering what you enjoy doing for yourself, you can start thinking about how you can connect with groups that enjoy the same thing. Walking groups, gardening, craft, exercise, history, stamps, film appreciation, bird watching, cleaning tips, decorating, furniture arranging etc etc etc.
Leading eventually to after lockdown being able to connect to people IRL.
The need to have someone to talk to is universal and does not have to be limited to a spouse/partner.
It's so nice to see that you are making your way forward every day.