Hey, I don’t know if you do this already but my surgeon recommended that I massage a moisturiser into my incisions (eg cocoa butter, bio oil) as it helps break down the scar tissue and prevents them from being lumpy. I did this from around 2.5 weeks post op (as per his instructions and my incisions were closed by this point) and although my scars are still visible 6 months post op and need to fade more, they are flat and smooth so you can’t feel them.
I agree with LK if you don’t want to tell him in advance then don’t but he might notice and say something so maybe think how you would deal with it if he did. Or he might notice and guess what they’re from but not ask until you bring it up. Either way if he’s a good guy it shouldn’t change how he feels about you. x