Should I return my bikini?

so i bought a bikini today, really expensive $70....it looks better on me than most bikinis (hence the price) and the quality is good. the reason why it's hard for me to look good in bikini is because of my butt, the bottom was perfectly done and i look good in it. however, my stomach is still the problem - when i sit down, ewwww u can see it but that's the same with every bikini. Is $70 worth it or should I just spend $40 on a tankini or one piece??