How old is your dad?
How long were they married?
How many friends that he has known for that same amount of time? Married or single?
I ask because IMHE, as we age, there are a lot of us, whose friends all go different ways as life and moving take us. A friend of mine recently came in town when his father passed away, I hadn't seen him in 20 years, at least.
Your someone whose opinion he trusts, and at the same time, he probably wants to know how you feel about him dating again. (too soon, are you going to be fine with it, etc)
Have someone I know, most of the family of (more acquaintance then friend), that he was dating within three months of his wife's passing. He had fought cancer and met this woman while fighting it, and the day he was diagnosed clear/remission, his wife was diagnosed terminal. So he had been talking to this woman pretty regularly as their treatments were back to back, often. His daughter refuses to speak to him, because it was too soon, and how could he have only known her for three months, etc.
I actually went on my first date in 27 years, back in December. I had given up since my proposal to a gal was met with "my goal is to be a kept woman". Because my income is very disproportionate to my friend circle, her goal was I was a stepping stone.
A gal that I have known, most of her life (she is younger then me, and I have always dated older women), was in and several of the kids at work were pushing for me to date her (she's giving out all the signals, you two are practically blushing when talking to each other, etc) She started to ask for a part time job and I ended up saying probably not a good idea for someone I could date, and then we went out.
Between the holidays, and our schedules being nearly 180 out, we agreed it wasn't a good time, but I still get texts from her.
So yes, I am very out of practice and the employees had some fun with me by telling me of "restaurants" to take her to, and one turned out to be an adult novelty store (haven't been to one of them for decades).