How do I lose fat around my belly?

Spot-reduction (losing fat in one place) is not possible[1][2]. Your body distributes fat across the body.

It is commonly said that "abs are made in the kitchen". By focusing on fat loss you will allow your abdominal muscles to be seen.

References

1.^Vispute SS, Smith JD, LeCheminant JD, Hurley KSThe effect of abdominal exercise on abdominal fatJ Strength Cond Res.(2011 Sep)