To address your scar, you need to consider what is involved. Once you have a scar, it will never go away but it can be made less obvious. In your situation, a scar revision would involve excising the scar to give you a new one. However, your existing scar seems to have healed well: relatively smooth line, pale colour. A revision will lead to a visible reddish discolouration that will take time to fade. The improvement could be in making the scar a straighter line. However there is a risk that it may not heal well and lead to a widened scar or a hypertrophic scar. I would recommend that you let it be. It almost looks like a really good muscle definition!
Martin Jugenburg, MD