How long does the healing process take..?

So my ex of nearly 4 years who I was engaged to broke it off suddenly a while back. I've been on a few dates since then but just about everywhere I go there's always something there to remind me of her. It's been 2 months since the breakup and I'm kinda wondering how long this process is gonna last. I don't feel like I've made any progress as most of my days just seem monotonous and repetitive. I'm not depressed, I just feel stuck in limbo. Anyone have a clue how long this typically lasts?