I literally just went through this exact situation, you're not alone. I have sent 7 of my animals to a wonderful rescue (and of course donated their houses and food so they weren't just dumped there for the rescue to figure out what to do with them), am planning on shipping a leopard gecko out in the Spring to her new home, and am debating about selling my 4 ball pythons I hatched when they are larger, as it's easier to find homes for them as larger females. Honestly, the free space I have and less responsibility is a huge relief. I miss them of course, but I feel it was the right thing to do. I still have a leopard gecko and 7 snakes (apart from the ones I'm debating about rehoming) and I can't say that I've spent more time with them just yet, but I do feel much less overwhelmed. I think that if I had gotten rid of all of my animals at once I'd have debated whether or not it was a good choice, so I say to start rehoming animals until you stop feeling this way.