Love is eternal and can give you strength.
The soul/energy of your previous pet did not disappear, you just can't see it but it is still in the universe.
You are not separated in your hearts, you are just in different dimensions, hence can't communicate.
What I know is, your previous pet most likely wants you to be happy, regardless if he's around or not.
The best thing you can do for your baby now, is live the best life you can, as contently as you can.
It is hard but you will make it.
This cat chose you - it is charming, seems good-natured, accept it - it will help you 💗