I like Tracey's idea. Wine first, try on suits second.
Seriously, though, I think we pretty much ALL feel your pain. What IS it about women's bathing suits? They pinch and squeeze, making flesh look fleshier, or else they stretch and sag. So annoying. I've studied an awful lot of bodies over the years (life drawing classes), and I've come to the conclusion that women of all shapes and sizes look better naked than in a bathing suit.
As it happens, I need a new suit myself. I have two reasonably flattering bikinis for the beach, but I always feel like a complete berk wearing a bikini to the swim pool with my kids. I think this time I'm going to go for the bust-squashing Speedo style, and I'm going to try not to care.