I Think Too Much

So a couple of year ago my dad passed away. I miss him a lot. Growing up I grew really fond of his best friends that he had from high school, it was also really fun being with their kids who were around my age. Leading up to my dad's passing he was kinda of distant with is friends due to his addiction problems so I hadn't seen his friends in a long while. But I really miss those good old happy days and I want to see them again. I don't know what to do about it because I feel like they might think its weird that I want to hang out because they are all in their 40s, but I really want to see them again!