My dad passed some years ago, and I was very close to him and was devastated when he went. I was only in my late 30s. (Got on with my mum but was a daddy's girl.) We'd had his funeral, and I was trying to look after mum, and trying to look after my kids/do my job etc.
So about 5 weeks after he died, (and 3 weeks after his funeral,) I was half asleep/half awake/partially in slumber, and I 'FELT' my dad next to me. I could hear him, I could feel him, I could smell him (soft smell of roll-up tobacco, his aftershave, his brylcreem,) and I said 'I miss you dad, I wish you hadn't gone.'
Then I started telling him his sister is OK. His sister was 10 years younger and had a heart attack 2 weeks after he died, and she was recovering in hospital and doing OK.
Some would say this was a dream, an illusion, a fantasy, maladaptive daydreaming etc, but to me, he was there. His spirit was there, his energy was there. I couldn't see him, or hear him speak but he was there. I could feel a weird buzzing and tingling in my hands and face, and I felt warm. As God is my witness, to this day I swear he was there for those few minutes.
Something similar happened a week later, but not as intense, and it never happened again. Mum died less than a year later. Never happened with her.
@PolkaDooka I do feel you, I do relate, and I do believe you. 