Ok, well, try walking for 10 minutes at a time. 5 minutes in one direction, turn around come back. I don’t know how long it will take to do this until you can do more.
Is there a park or park bench near your house? You could walk a very short distance, rest, then walk back home.
Friendships are not very complicated. You feel better about yourself in their presence and they feel better about themselves in your presence. Being attractive and attracting company is not exactly the same but similar. If you are attractive for any number of possible reasons others will feel somewhat honored to be welcomed in by you, it would validate them as being likewise attractive.
Once a casual friendship has been established and the level of communication deepens we get to experience additional levels of friendship which might include trust and unconditional loyalty to varying degrees.
I started doing something after my divorce 25 years ago that has proved very effective. First of all I radically changed the criteria of those I would like to call friends. If I do run across someone that meets my criteria I freely express my appreciation for whatever it is I feel the represent, opinions, work ethic, whatever? Very simple concept and easy to implement.
I don't look at it like they want me to change. I see change as an opportunity to continue growing. 25 years ago my friends were addicts, alcoholics, ex-cons etc. Today my friends are on the polar opposite of that spectrum. My friends today are people I admired greatly but was afraid to approach. Willingness to change or grow however you want to look at it is sometimes a condition of social acceptance.