I lost my dad 14 years ago. I hope you get to have as much of the remaining time together as possible.
What's odd is that I still don't feel the need to look at photos of him. Like, no need whatsoever. I don't have a photo of my late dad on the wall, even though we had a truly excellent father-son relationship with a lot of warmth. The true memory of him resides in my head; and what's more, I notice myself replicating his exact body language at times. Explicitly realizing this always feels funny, almost like I want to express gratitude to him for "inheriting" those movements to me :). I think the bonds still hold strong, and they forever will, but, oddly, there's no need whatsoever to visualize it with a photo. It's simply much deeper than that.
On another side, I often miss the ability to ask my dad "factual", practical questions. E.g. -- because he was a construction engineer -- how to do some specific thing in grandpa's house renovations; how to position a beam, etc. During the first months after his death, this was a common recurring thought: I'm stuck while building something, but "hey, I'll just ask dad tomorrow how to do it right; yeah, I'll just call him" -- following by "oh, I forgot I can't". After this, there was always an interesting feeling of emptiness or standstill -- not sadness, just a really deep understanding that, no matter what, life moves on. And I still get to live mine. I actually came to enjoy those moments of emptiness.
Thanks for sharing your story, it is very moving. Grief will have different stages; to me, it has mostly been really deep introspection. Take it easy, mate.