When does it get easier?

So we had to unfortunately rehome our puppy a few months ago due to some family circumstances. It was extremely tough and definitely the hardest thing I’ve gone through so far as she was such a lovely sweet little thing.

How long should it take to get easier? I still cry daily about it and it consumes my brain thinking about her because it wasn’t a decision I wanted to make and that’s what makes it harder.

Any advice would be lovely please as the guilt I feel is horrendous but I hear she’s happy and loving life which makes me feel somewhat happy!