Hi Soph
I know exactly how you feel. Around about this time last year, maybe not that long we lost our beautiful ginger boy 'Simba'. What a fantastic cat he was, always wanting cuddles and to be loved, followed me around, slept in our bed (sometimes drooling with excitement LOL) he really was great and I was and still am devastated that he was run over about 3 feet from our garden in the early hours of the morning - luckily a neighbour saw him before I did. I still can't believe he has gone and although the pain gets a bit easier I get that ache feeling in my heart when I think of him. I would do anything to have one last cuddle with him

I also had to put down my GSD at the age of 11 at the beginning of Feb and my Mums other GSD about 4 weeks later, she was only 5! It is so difficult and although I have my 2 Rotts and 2 other cats they can never replace Simba, Axie or Pumba - I am so lucky with my animals and can only hope they all greet me when the time comes...if so I will not be afraid to go!
He would have known how much you loved him, in fact I am sure Simba still hangs around our house as things have happened...maybe your cat does too - I never got to say bye to Simba or my mums Pumba but know they knew I loved them with all my heart.
I hope you feel better soon -x-