Hi Nit, I am a homebody too,but I made myself get out and about and do things, it really helps with detachment and healing. I too haven't much money and I note you love your dogs, I made some lovely new friends just from dog walking and engaging in conversations with them.
I also do some voluntary work, costs me nothing really but gives me so much.
I see you always call your X my husband and maybe if you could write xhusband it would help you to detach. I found this so hard the first few times but it did help. I still don't like to say the word Divorced but I think thats a generation thing,like there is a stigma and shame attached to it.
It is so hard to move out of our comfort zone and try new things, easier to remain out of circulation and with what we know but I can tell you the rewards are great if you manage it.
Does your church have any groups you could join or a sewing group, we have a quilters group and they all meet to sew and chat once a month.
Your x husband may be lost but he has remarried and has a new life, you have to be the one to heal yourself now and it will help to remove the thoughts you have if you just try a few new things.
Take care.