Is it weird that I've moved on so quickly?

Hello. I got divorced at the beginning of this year, after my husband told me he still loved someone else. At first it was really hard- I cried every day and worried all the time- but now I just don't feel any pain anymore, even when I reminisce. I truly did love him, but I guess I'm at peace knowing that it's something I couldn't control (my ex-husband is gay). He and I have recently come in contact again, and though I really did love him, I'm happy for him now that he's with his previous lover. I think the distance helps, too- I moved out of Helsinki and back to California, and he went back to Russia. Is it strange that in just five months, I'm over him? I miss our friendship more than anything else- I've come to realize that though he and I cared about each other deeply, it wasn't in a romantic sense for him, ever. We were more like brother and sister than anything. I've met this new guy from work, and he and I have become good friends. I'm thinking of asking him out. Should I? By the way, if this helps, it's normal for me to be on good terms with my exes. I'm living with one of them right now, along with another mutual friend.