I am so sad to hear of your loss Rosie, I too lost my dad 7 years ago and I know how much I still miss him and how painful it was to let him go.
Let yourself grieve for him, just take as long as you need, then remember all those wonderful moments you spent together throughout your life and all the joy you had with him will keep you warm and safe just like your dad always did.
All I can wish for you is the strength to hold yourself together through this difficult time and know that you will be in my thoughts.
Best wishes

Cat