putting dog to sleep 😭

Im coming here just because talking about stuff on here has helped in the past. I have a dog she’s probably about 11 or 12 years old. she has diabetes and has been completely blind for years, and now has glaucoma. the surgery to remove her eyes is very expensive and we can’t afford it right now. so we’ve chosen to put her to sleep. she seems so sad and depressed all the time. always sleeping, and stays in the same spot all day. I don’t think she’s very happy and the glaucoma has put her in alot of pain.

even though I know she will be in a good place I’m so sad. does anyone have any words of encouragement to get over this. I stopped following religion a long time ago but I just want to hope there is a good place for pets to go when they move on. 😢